Juan Martin del Potro is withdrawing from the ASB Classic (Auckland, New Zealand) and the Australian Open due to fitness concerns.

The 6’6” Tandil native was sidelined first in 2010 (right wrist) and then 2014 (left wrist) and needed entire seasons to recuperate. His most recent comeback came in February at the Delray Beach Open, where he reached the semi-finals, falling to Sam Querrey. He would go on to compete in 11 other tour-level events, including a title run in Stockholm (d. Jack Sock). He also reached the US Open quarter-finals (l. to Stan Wawrinka).

“It was a very special year for me,” said del Potro in November about his 2016 season. “I didn’t expect the results that I had.”

Del Potro finished the season with a 32-12 record, propelling him to No. 38 in the Emirates ATP Rankings after beginning the year in the 590th position. For his efforts, his fellow players voted him the Comeback Player of the Year in the ATP World Tour Award presented by Moët & Chandon.

Del Potro also compiled an incredible run at the Summer Olympic Games in Rio, where he claimed the silver medal after a four-set loss to Andy Murray. En route, he stunned Novak Djokovic in the first round and defeated Rafael Nadal in the semi-finals. In November, he joined Argentine teammates Guido Pella, Leonardo Mayer, and Federico Delbonis in defeating Croatia for their country’s first Davis Cup title.

Lleyton Hewitt (Retired: 21 January)
Lleyton Hewitt had already completed his final lap around the ATP World Tour in 2015, capped by a second-round finish at the Citi Open in Washington, but the Aussie legend had one last goodbye reserved for his home fans at the Australian Open. The former World No. 1 – and youngest to ever ascend to the top spot at age 20 – drew the curtain on his storied career in his 20th successive trip to Melbourne Park, defeating James Duckworth in his opener, before falling to eighth seed David Ferrer.

As expected, the 34-year-old Hewitt left it all out on the court, but Ferrer held off the Aussie’s challenge to claim victory in two hours and 32 minutes on Rod Laver Arena. Hewitt was watched from his box by his family, Tony Roche and Thanasi Kokkinakis among others.

“I came out and gave everything I had like always,” said Hewitt following the match. “I left nothing in the locker room. That’s something I can always be proud of. My whole career I’ve always given 100 per cent… It’s a weird emotion; I don’t think it will fully set in for a couple of days’ time. As I’ve always said, I’m such a competitor, I try and push myself all the time to get the most out of myself. Obviously it was in the back of my mind coming into every match this week, but I have had a fantastic last month.”

Hewitt spent 80 weeks at No. 1 in the Emirates ATP Rankings and capped his career with 30 tour-level titles. His biggest crowns came at the 2001 US Open, 2002 Wimbledon Championships, year-end Tennis Masters Cup from 2001-02, and at the ATP World Tour Masters 1000 event in Indian Wells, where he lifted the trophy in consecutive years from 2002-03. The two-time year-end No. 1 in 2001-02, the Adelaide native is also the third-youngest player to win an ATP World Tour title, having prevailed in his hometown at 16 years, 11 months.

Eric Butorac (Retired: 1 September)
With family and friends surrounding Court 9 at the US Open, Eric Butorac bade farewell to the doubles circuit. The affable former ATP Player Council president played his last professional match alongside good friend Scott Lipsky, falling to Raven Klaasen and Rajeev Ram 6-3, 6-4.

The 35-year-old father of two, who became USTA Director of Professional Tennis Operations and Player Relations in early October, is an 18-time doubles champion on the ATP World Tour. He won at least one title in each of the past 10 seasons, including five with Jean-Julien Rojer and three each with Klaasen, Lipsky and Jamie Murray. Butorac most recently lifted the trophy at the Millennium Estoril Open with Lipsky in April, his third title at the ATP World Tour 250 event.

“I never expected to have a career like this,” added Butorac, whose best Grand Slam result came in the 2014 Australian Open, finishing runner-up alongside Klaasen. “I moved to France to play money tournaments, then stumbled into Futures and Challengers and later moved my way up. It was a surprise to be out there doing it. To look back and say I did it for 13 years is a strange feeling, but also quite rewarding. I feel accomplished, I worked really hard and got to see the world and meet great people. It was a great experience.”

The former Division III national champion at Gustavus Adolphus College said his biggest contributions to tennis took place away from the doubles court. Butorac served on the ATP Player Council for eight years, including two as president.

“Off the court, being a part of the Player Council was something really special for me. It was something I stumbled into and someone nominated me for it. I took it very seriously, spending eight years on the council and doing two as president. That was something I’m very proud of. As much as anything I achieved on the court, for the good of the sport I was able to do a lot more off it.”

Michael Berrer (Retired: 18 December)
Another former ATP Player Council member bade farewell in 2016, as Michael Berrer played his last match at the inaugural European Open in Antwerp, before officially retiring in December. Nearly two years after initially deciding to announce his retirement, the German pressed pause on his departure following a successful 2015 campaign that saw him notch the biggest win of his career over World No. 3 Rafael Nadal in Doha. It was his first victory over a Top 5 opponent in 14 tries.

A genuine and charismatic personality, Berrer was a dogged competitor between the lines, exuding passion and energy that made him an instant fan favourite. He left his mark on the court in ascending to a career-high World No. 42 in the Emirates ATP Rankings, reaching consecutive ATP World Tour finals on the indoor hard courts of Zagreb in 2010 and 2011, as well as posting a 235-152 record on the ATP Challenger Tour, including 11 titles. Off the court, he took part in the ATP’s scholarship program, obtaining a Bachelor’s degree in psychology at the University of Phoenix.

“I was still able to do some damage on tour and end it on my terms,” Berrer told ATPWorldTour.com. “It’s a new situation for me now, but I feel pretty good about it now. Being on tour was something I always enjoyed. I liked to spend time with the ATP employees and the players. It was always a good time and never a stressful one. There are many moments I will never forget. My victory over Rafael Nadal (in Doha) was special and playing on Centre Court at Wimbledon in 2008 too. Those were moments that I always enjoyed. Playing in the United States too, especially reaching the third round in Indian Wells. The crowd gives you a great reception there and they really appreciate athletes.”

Berrer Retires at 36, Ready For Next Chapter

Other Farewells: Rui Machado, Andreas Beck, Jesse Huta Galung, Julian Reister
After 14 years on tour, one of the best players in the history of Portuguese tennis hung up his racquet in mid-June. Rui Machado, who attained a career-high No. 59 in the Emirates ATP Rankings in October 2011, decided it was time to retire.

“What made me decide to retire was having many injuries in recent months that did not let me practise and compete the way I’m used to,” said the 32-year-old Machado. “I really felt that my body was asking for some rest.”

After suffering wrist and knee injuries that largely kept him off the tour in 2006 and 2007, Machado was able to return and produced the best results of his career. He became a dominant figure in clay-court events on the ATP Challenger Tour, winning all eight of his titles on the surface from 2009-11. Fittingly, his best result on the ATP World Tour came at home, when he reached the quarter-finals of 250 event in Estoril in May 2010.

Machado Calls Time On Tennis Career

Andreas Beck, Jesse Huta Galung and Julian Reister all said goodbye towards the end of the season, with Germans Beck and Reister hanging up their racquets in October and Huta Galung in December. Former World No. 33 Beck reached his lone ATP World Tour final on the clay of Gstaad in 2009 (l. to Bellucci), with his best Masters 1000 result coming in Monte-Carlo earlier that year. He earned his lone Top 10 win over seventh-ranked Gilles Simon in the second round, en route to the quarter-finals. Beck also claimed five ATP Challenger Tour titles and amassed a 201-140 win-loss record on the circuit.

Huta Galung, meanwhile, achieved a career-high No. 91 in the Emirates ATP Rankings in February 2014. The Dutchman’s biggest victories came over former Top 10 players Ivan Ljubicic (Rotterdam 2012) and Janko Tipsarevic (Johannesburg 2011). He captured 10 titles on the ATP Challenger Tour in total.

Hamburg native Reister ascended to a peak position of World No. 83 in the Emirates ATP Rankings in November 2013. A winner of five ATP Challenger Tour titles, he also enjoyed success at the tour-level, reaching the third round at Roland Garros in 2010, before falling to Roger Federer. As an unseeded wild card, the German stunned World No. 16 Fernando Verdasco 6-2, 6-3 in Hamburg in 2012.

Over the past 16 years, Michael Berrer has called the ATP World Tour his home, traversing the globe while performing his dream job at the highest level. After 620 matches in more than 100 cities, the German has hung up his racquet for the final time, announcing his retirement at the age of 36.

The gregarious left-hander has had a burgeoning affinity for the game, ever since he first picked up a racquet as a young boy in Stuttgart. A genuine and charismatic personality, Berrer was a dogged competitor between the lines, exuding passion and energy that made him an instant fan favourite. For those fortunate to compete on the ATP World Tour and call it their profession, it is privilege, a sentiment echoed by Berrer as he looks back on his time between the lines.

“It’s a new situation for me now, but I feel pretty good about it now,” Berrer told ATPWorldTour.com. “For me, being on tour was something I always enjoyed. I liked to spend time with the ATP employees and the players. It was always a good time and never a stressful one. Even when you are traveling, you meet so many people and interact with so many characters. From the check-in and security at the airport and the tournament personnel, I loved it.

“There are many moments I will never forget. My victory over Rafael Nadal (in Doha) was special and playing on Centre Court at Wimbledon in 2008 too. Those were moments that I always enjoyed. Playing in the United States too, especially reaching the third round in Indian Wells. The crowd gives you a great reception there and they really appreciate athletes.”

While Berrer has certainly left his mark on the court, ascending to a career-high World No. 42 in the Emirates ATP Rankings, reaching consecutive finals on the indoor hard courts of Zagreb in 2010 and 2011, as well as posting a 235-152 record on the ATP Challenger Tour, including 11 titles, it is his achievements off the court that have prepared him for a fruitful career outside the lines.

Berrer took part in the ATP’s scholarship program, which gives players the opportunity to further pursue their intellectual interests via online college courses at the University of Phoenix. While competing full-time and raising his now four-year-old daughter Mia-Marie with wife Nadine, Berrer worked towards a Bachelor’s degree in psychology from 2011-15 and is in the process of completing his Master’s thesis in sports psychology. His focus? An issue that he believes plagues many professional athletes: Fear of success.

“It’s a common thing that many players have,” said Berrer. “There are many limiting factors that players display. That’s why I chose this topic. It’s very interesting, but it’s not a weakness. Even the best players in the world have that, but they have a way of overcoming these feelings and that’s why they are the best. You need to have coping strategies. It’s not a secret. If you watch it from the outside perspective, obviously it’s difficult to understand, but everyone is human.

“The biggest strength is that you are resilient. I first came to the Top 100 when I was 27. Most people are younger. Even if you are older, you can always improve. This must be your driving engine to always want to improve. If you don’t want to improve and get better, then you should try to find a different occupation. And you need to surround yourself with people that encourage this desire to grow.

“I needed the help of a sports psychologist myself. It’s hard to use all these theoretical frameworks on yourself because it doesn’t really work so much. You have some mechanisms, but it’s not easy to self-analyse. I’ve worked with really good people and it gives you a lot of positive energy.”

MICHAEL’S FIVE BIGGEST LESSONS LEARNED

A wealth of knowledge from countless hours on court and behind the scenes at tournaments provided a distinct opportunity in Berrer’s studies. With such a unique perspective, as the only player with his pedigree to pursue such a degree, he greatly drew upon his experience. Exclusive access to players and coaches, in particular, enhanced this angle and yielded more comprehensive research in constructing his thesis.

“I was doing questionnaires with a lot of coaches,” said Berrer, who also served on the ATP Player Council from 2008-09. “I approached coaches more, but I used my personal experience with players. If I can’t use my personal experience as a player, I don’t know who can. There isn’t one person doing a psychology thesis that’s better than me in tennis, so I’m pretty hopeful that it will be accepted.

“The ATP and University of Phoenix provided the perfect program and it was really challenging to do. Instead of going out, I was studying and working hard. You have to be online every other day and submit substantial posts that are evaluated by the instructor. There are a lot of written assignments. Writing skills are very important, so you also become even more fluent in English. Getting my certificate is just a piece of paper but it’s an important one. It’s good to have it. There aren’t a lot of former athletes who can say they have a degree right after finishing their career.”

Berrer played his last match at the inaugural European Open in Antwerp in late October, nearly two years after initially deciding to announce his retirement. The German had entered the Qatar ExxonMobil Open at the start of the 2015 season, having decided to call it a career by year’s end, but his campaign got off to quite the auspicious start. He would notch the biggest win of his career in the Doha first round, storming back to stun World No. 3 Rafael Nadal 1-6, 6-3, 6-4. His first win over a Top 5 opponent in 14 tries drove Berrer to one of his best seasons on tour and he would delay retirement for one more year.

A run to the third round at the BNP Paribas Open and first ATP World Tour semi-final in more than three years, in Bogota, would ensue, and he began climbing the Emirates ATP Rankings once again. As the calendar flipped to 2016, the 36-year-old would become the oldest Challenger winner this year, when he battled to the title in Leon, Mexico.

“I was still able to do some damage on tour and end it on my terms.”

With his playing career in the books and his studies wrapping up, Berrer has created a strong foundation to tackle his many prospective endeavors. He is already looking forward to a position with the German Tennis Federation in marketing and sponsorship, while also developing a plan with a consultant to go into motivational speaking.

“I’m feeling pretty happy actually. During the year I was nervous about what is coming up after my career and was under some pressure. But I have so many opportunities now and I decided to test a few things to see what will fit my personality the most. I will also get the chance to spend some time with good players in my regional federation to see how coaching works out for me. It’s some amazing things that I’m trying to develop. I’m really feeling good about it.”

The ATP World Tour announced the final list with the participants in the main draw for Garanti Koza Sofia Open’s second edition. The tournament will be held in “Arena Armeec” in the Bulgarian capital 5-12 February 2017.

The hosts and organisers are expecting extremely strong competition in February. The Sofia field includes 11 players in the Top 50 of the Emirates ATP Rankings: Dominic Thiem (No. 8), David Goffin (No. 11), Roberto Bautista Agut (No. 14), Bulgarian star Grigor Dimitrov (No. 17), Viktor Troicki (No. 29), Philipp Kohlschreiber (No. 32), Gilles Muller (No. 34), Martin Klizan (No. 35), Marcos Baghdatis (No. 36), Nicolas Almagro (No. 44) and Andrey Kuznetsov (No. 46).

“It will be a really world-class tournament and the fans will enjoy great tennis throughout the whole week in Sofia,” said the tournament director Paul McNamee.

The draw will include 21 direct entries, along with three wild cards and four qualifiers. Included in this field are the four semi-finalists from last year’s inaugural tournament: champion Bautista Agut, runner-up Troicki, and semi-finalists Muller and Klizan.

Two former Top 10 players – Marcos Baghdatis and Nicolas Almagro, will make their debut in Sofia in 2017.

Baghdatis reached a career-high No. 8 in the Emirates ATP Rankings in August 2006, the same year he reached the Australian Open final (l. to Federer). The 31-years old owns four ATP World Tour trophies from 13 finals. The Spaniard Almagro climbed to No. 9 in the rankings in May 2011. He owns 13 titles.

Here is the Official Garanti Koza Sofia Open 2017 entry list:

1. Dominic Thiem (AUT)
2. David Goffin (BEL)
3. Roberto Bautista Agut (ESP)
4. Grigor Dimitrov (BUL)
5. Viktor Troicki (SRB)
6. Philipp Kohlschreiber (GER)
7. Gilles Muller (LUX)
8. Martin Klizan (SVK)
9. Marcos Baghdatis (CYP)
10. Nicolas Almagro (ESP)
11. Andrey Kuznetsov (RUS)
12. Mikhail Youzhny (RUS)
13. Robin Haase (NED)
14. Adrian Mannarino (FRA)
15. Damir Dzumhur (BIH)
16. John Millman (AUS)
17. Steve Darcis (BEL)
18. Andreas Seppi (ITA)
19. Nikoloz Basilashvili (GEO)
20. Jerzy Janowicz (POL)
21. Dudi Sela (ISR)