Reigning Open 13 Marseille champion Nick Kyrgios opened up his title defence with a 6-4, 6-2 victory over Malek Jaziri on Wednesday.

The third seed won all five matches in straight sets and without dropping serve en route to lifting the trophy in 2016. The Australian replicated that dominance over Marseille debutant Jaziri, striking a twelfth ace on match point to advance into the quarter-finals.

 Watch Full Match Replays

“I had a tough Australian Open, so I was looking forward to coming back here. It’s where I won my first ATP World Tour title and I have great memories from this court,” said Kyrgios. “The crowd is always great, I love playing in Marseille, so I’m happy to be back.”

The 21-year-old will face Alexander Zverev’s conqueror Nicolas Mahut or qualifier Norbert Gombos in the quarter-finals. “Everyone in the draw is really good, there are plenty of players who can win this tournament. So I have to take it one match at a time and see if I can make the final again.”

An early contender in the Emirates ATP Race To Milan, Daniil Medvedev, claimed his seventh win of the season as he rallied to defeat eighth seed Benoit Paire 5-7, 7-5, 7-6(4) in two hours and 25 minutes in the first round of the Open 13 Marseille on Wednesday.

The 21-year-old Russian, who lives in nearby Antibes, twice dug himself out of a hole against home favourite Paire. He rallied from 1-3 down in the second set – breaking the Frenchman to 15 as he served for the match in the 10^th game – and from a double break 0-3 deficit in the decider.

Watch: Medvedev’s Road Trip To Marseille

“It was a really tough match,” said Medvedev. “I’m really happy to win, because not everything was going good for me. I wasn’t playing my best tennis in the first two sets. I was making a lot of unforced errors. 

“In my mind, I just had to keep on fighting. I was a bit too nervous during the match, that’s why I was lost the first set and was losing in the second. Finally, I managed to step up my game a little bit and be more consistent. I started to play some really good tennis in the third set, especially in the tie-break.” 

 Watch Full Match Replays

Medvedev has staked an early claim for one of the coveted eight places at the inaugural Next Gen ATP Finals in Milan in November. The Russian is currently second in the Race, having reached his first ATP World Tour final at the Aircel Chennai Open (l. to Bautista Agut) and the quarter-finals in Montpellier (l. to Tsonga).

Sixth seed Richard Gasquet booked his spot in the quarter-finals with a 7-5, 6-2 victory over Mikhail Youzhny. The Frenchman is looking to reach his second ATP World Tour final of the season, having finished runner-up at the Open Sud de France two weeks ago (l. to Zverev).

In an all-French second-round contest, seventh seed Gilles Simon overcame Julien Benneteau 6-2, 2-6, 6-3 in just over two hours to reach the quarter-finals. The 32-year-old Simon is bidding to win this ATP World Tour 250 tournament for the third time, having lifted the trophy in 2007 (d. Baghdatis) and 2015 (d. Monfils).

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Rio Open presented by Claro – Rio de Janeiro, Brazil

Bruno Soares and Jamie Murray went head-to-head with UFC stars Jose Aldo and Minotouro. Aldo loved his time at the tournament so much, he came back to watch Thomaz Bellucci oust top seed Kei Nishikori!

David Ferrer, Bellucci, Soares, Pablo Cuevas, Marcelo Melo, Pablo Carreno Busta, Stephane Robert, Gastao Elias, Nicholas Monroe and Artem Sitak were among those to have a great time at the players’ party at Windsor Atlantica Hotel.

Ferrer and Bellucci visited one of the most picturesque sites in Rio, the Lagoa Rodrigo de Freitas.

Dominic Thiem enjoyed a visit to Copacabana, while Janko Tipsarevic took a walk on Ipanema Beach.

Soares and Joao Souza visited Livraria de Travessa for the draw ceremony and a bit of shopping.

Open 13 Provence – Marseille, France

Defending champion Nick Kyrgios took time out of his schedule to bring smiles during a visit to La Timone Hospital. The Aussie even played games with some young children.

ATP World Tour Uncovered picked up #NextGenATP’s Daniil Medvedev from his home in Antibes and made the drive with him to Marseille ahead of his tournament debut.

Delray Beach Open – Delray Beach, Florida

Kevin Anderson and Bjorn Fratangelo went head-to-head in a series of beach games. Watch

Santiago Giraldo enjoyed the sun and sand at the nearby beach, learning beach tennis while he was there. Watch

Bob Bryan, Mike Bryan, Raven Klaasen, Treat Huey, Michael Venus, Robert Lindstedt, Jonathan Erlich, Scott Lipsky, Divij Sharan and Purav Raja participated in Pro-Ams.

Ever wondered just how effective a first serve is over a second serve?

The answer is right around 40 per cent better on average, and surprisingly, it has changed very little in the past quarter of a century in our sport.

A 26-season study of first-and-second serve-win percentages from 1991 to 2016 uncovered that time and technology have had very little influence on the performance of what is widely regarded as the most dominant shot in a match.

Tennis discussions often focus on how athletes are getting faster, racquets are getting more powerful, and strings let players manipulate the ball like it’s on a Yo-Yo. These factors all seem to be true on the surface, but somehow fail to significantly move the needle when you look at raw serve analytics.

An Infosys ATP Beyond The Numbers analysis of the Top 50 performers in first and second serve points won every season from 1991 to 2016 uncovers an average 43 per cent improvement in first serve points won over second serve points won. Since 2000, the average has been slightly less at 41 per cent.

World No. 1 Andy Murray averaged winning 76 per cent of his first serve points in 2016, and 54 per cent on second serves. That created a 41 per cent advantage for his first-serve win percentage over his second serve – exactly the same as the larger 2016 sample size.

Top 50 Performers 1991-2016: 1st & 2nd Serve Wins Percentage / Percentage Difference

Top 50 – 1st Serve Points Won Average (75%)
The ATP Stats LEADERBOARDS, powered by the Infosys Information Platform, show that the Top 50 performers in first-serve points won each season has hardly changed at all over the past 20 years, dating back to 1997. The average has either been 73 per cent, 74 per cent or 75 per cent. The highest season was 1996 at 76 per cent, which was the only time it reached that level since 1991.

Top 50 – 2nd Serve Points Won Average (52%)
There has also been remarkable consistency in average second-serve points won as well, producing an average of 52 per cent points won, while deviating just four data points from 50 per cent to 53 per cent. For the past 14 straight seasons, from 2003 to 2016, the points won average of the leading 50 players in this specific service category has been 53 per cent each year.

Top 50 – Percentage Difference (43%)
The average difference in points won of 43 per cent was bumped all the way up 50 per cent in 1997. The mid-1990s in general were the most dominant serving era in our sport, with players such as Pete Sampras, Richard Krajicek, Goran Ivanisevic, Greg Rusedski and Boris Becker leading the way.

At the recently completed 2017 Australian Open, players averaged making 61 per cent of their first serves for the tournament. Tennis in so many ways is a numbers game. Knowing how many first serves typically go in, what their return investment is, and the corresponding win percentage with second serves helps us better organise the sport in our minds. And also allows us to know exactly what to expect in a match.

It’s almost as if Borna Coric has hit the reset button on his young career to start the 2017 ATP World Tour season. The 20-year-old Croatian is working with a new coach. He has changed racquet brands. The right-hander has his health back as well, following surgery on his right knee late last season.

It should all add up to an improved year for the Zagreb native, who had to cut short his 2016 campaign because of the knee surgery in early September. Physicians removed two small pieces of bone that had broken off and lodged inside a tendon in his right knee, Coric said.

He sat out from tennis for about two months, taking the court again on 10 December. But it’s been a slow recovery for the #NextGenATP player. Coric experienced pain in his shoulder and hip, and he underwent more rehab after his first-round loss to Alexandr Dolgopolov at the Australian Open last month.

“It was a tough comeback but now I’m more or less fine,” he told ATPWorldTour.com in Delray Beach.

You might expect a 20-year-old who’s already achieved impressive results – last year, at 19 years, 9 months, he became the youngest ATP World Tour Masters 1000 quarter-finalist since Novak Djokovic in 2006 – to be expecting instant results for his new-look 2017. But Coric, who was closing in on the Top 30 before his surgery, is approaching the season with the mindset of an ATP World Tour veteran.

“I have changed many things in my game… So I need some time to adapt,” he said.

Of the various changes, Borna Coric is perhaps most enthused about his coach, Ivica Ancic, whom Coric has known since he was 12. Ancic is the older brother and former coach of Mario Ancic, who reached No. 7 in the Emirates ATP Rankings and won three ATP World Tour titles but had to retire in 2011 because of health problems, including complications from mononucleosis.

Coric split with former coach Miles Maclagan in September, and he took seriously the task of finding a new coach. He had two phone conversations with Ancic and met with him one-on-one on two other occasions, chatting with Ancic for two hours each time.

“I think it’s important to meet the person who you’re going to travel with maybe the rest of your [career],” Coric said. “Obviously I felt like we’re going to click.”

The young Croatian has experienced a few coaching changes since turning pro in 2013. He has worked with Zeljko Krajan and Thomas Johansson. The changes haven’t been all bad, though. By working with different experts, Coric said, he’s learned about himself and what works for him on the court.

He’s looking forward to stability with Ancic. “It’s tough to change every six months because obviously every coach has maybe a different view on how you need to play and a different mentality,” Coric said.

He and Ancic are in agreement on the way forward for the right-hander who was on the cusp of winning his first ATP World Tour title twice last season. In January, Coric lost in the Aircel Chennai Open to Stan Wawrinka. Three months later, he fell to Federico Delbonis on the clay in Marrakech.

“I need to be more aggressive obviously than I was but then at the same point, I need to be careful to not be too aggressive,” Coric said. “If you only practise on attacking, you’re going to lose some part of your game, which is the defense, which is the best part of my game. So I need to be careful not to lose what I’m best at.

Read More: Six Things To Know About Norway’s Ruud

“That’s the balance you need to find, which comes with matches, which obviously I’m trying to find now.”

He has found his rhythm at the Delray Beach Open, where Coric is making his debut. The Croatian breezed past Colombia’s Santiago Giraldo 6-2, 6-3, needing only 68 minutes to advance into the second round, where he’ll face top seed Milos Raonic. Coric feasted on Giraldo’s second serve, winning 71 per cent of those points (15/21).

Coric, No. 59 in the Emirates ATP Rankings, has never faced Raonic, who, at No. 4, is the highest-ranked player to participate in the Delray Beach tournament during its 25-year history. Win or lose, though, the Croatian is focused on the end game, what he hopes will be a long career on the ATP World Tour.

“That’s like with everything in life… There are ups and downs, obviously. I started playing better during the [U.S.] summer last year, then I got injured, which was unlucky. I was ranked maybe No. 40 and I didn’t have to defend almost any points. So I could have finished in the Top 30 maybe,” Coric said. “That’s tennis – ups and downs. Now starting the year I haven’t played for four months. I knew it was going to be tough to start. You just need to work your way up.”

#NextGenATP player Casper Ruud has caused a stir at the Rio Open, where he defeated Rogerio Dutra Silva to claim his first ATP World Tour win. Ahead of his second-round contest with Roberto Carballes Baena, we present the need-to-know on the 18-year-old Norwegian.

1. Tennis Is In His DNA
His father, Christian Ruud, was a Top 50 professional tennis player. He reached his career-high No. 39 in the Emirates ATP Rankings on 9 October 1995, and finished his career with 115 tour-level victories.

“I have a great relationship with my father,” said Ruud. “Sometimes in the world of sport it isn’t easy to have such a strong relationship, but for us it’s marvellous.

“We are both very competitive and both love to win at everything. We do it with the greatest respect and it’s a healthy rivalry. He is an essential part of my team. I don’t feel any pressure that he was a professional player. In fact, it’s the opposite; it has helped me a lot.”

2. He Scored His First ATP Win At A 500 Tournament
His first victory came in his third ATP World Tour tournament. “It’s been great,” said Ruud. “Not just winning my first match, but having the chance to be here and playing in an ATP World Tour 500. I am the lowest-ranked player in the draw, so I’m the underdog in every match and that’s more comfortable for me. I’m trying to keep my feet on the ground and keep working hard.”

Yesterday I was in sorrow for missing out @theweeknd concert in Oslo but today made it all up, thanks Rio!!??????? @RioOpenOficial

— Casper Ruud (@CasperRuud98) February 21, 2017

3. He Is Already A Rising Star In Norway
“Norwegians really like to see young, home-grown talent making progress,” said Ruud. “We have Martin Odegaard, who plays for Real Madrid, as well as one of the best skiers in the world, and now they are starting to enjoy tennis. It’s great for the Federation and for us. If people enjoy following me, then that’s great!”

4. He’s On A Rapid Rise
After turning professional in 2015, Ruud is a player who has got the most out of every experience in all levels of professional tennis. He won his first ITF Futures in Paguera, Spain, in February 2016. In his first ATP Challenger Tour event in Seville, also last year, he came through qualifying and ended up winning the title (d. Daniel).

In one year, the teenager jumped from outside the Top 1,000 to the verge of the Top 200 and also secured the prestigious No. 1 mantle on the junior circuit.

5. His Coach Is Spanish
Pedro Rico has been Ruud’s coach for two years. With the Spaniard, Ruud has made rapid progress. The partnership gels perfectly between the passionate Spaniard and the cool and calm Scandinavian. “The phrase I hear the most in Team Casper is ‘No Stress’,” said Rico.

“Pedro is great,” said Ruud. “He is helping me so much to get better, and together we have already gone from outside the Top 1,000 to be the No. 1 junior and close to the Top 200.”

6. Milan Is His Goal For The Season
“For the young players, the Next Gen ATP Finals is the biggest event we can win,” said the 18-year-old Ruud. “It is a big motivation.

“Everyone wants to qualify and that means it won’t be easy. It’s too soon to think about it at the moment, but for me it would be a huge honour to participate.”