Continuing our Season In Review series, ATPWorldTour.com looks back at five #NextGenATP players who impressed in 2017.

Daniil Medvedev, 21

Medvedev was the last player to qualify directly for the inaugural Next Gen ATP Finals, but the Russian made good use of his time in Milan. The Moscow native upset second-seeded countryman Karen Khachanov and American Jared Donaldson to reach the semi-finals, where he fell in five sets to eventual champion Hyeon Chung, 1-4, 1-4, 4-3(4), 4-1, 0-4.

Earlier in the year, Medvedev earned his first Grand Slam win and his first Top 5 victory by beating Stan Wawrinka on Centre Court at The Championships, Wimbledon. Medvedev also reached his first ATP World Tour final at the Aircel Chennai Open in India (l. to Bautista Agut).

Denis Shapovalov, 18

As far as breakout stretches go, the Canadian had one of the best in recent memory this season. Shapovalov stunned Juan Martin del Potro and No. 2 Rafael Nadal en route to reaching his first ATP World Tour Masters 1000 semi-final (l. to Zverev) at the Coupe Rogers in Montreal. Shapovalov became the youngest ATP World Tour Masters 1000 semi-finalist.

Weeks later, at his first US Open, the Canadian upset another ATP World Tour mainstay in Jo-Wilfried Tsonga before reaching the fourth round at the season’s final Grand Slam. The left-hander enters 2018 at No. 51 in the Emirates ATP Rankings.

Karen Khachanov, 21

The 6’6” Russian might have the biggest game of all of his #NextGenATP peers, a key reason many pundits and fans have compared him to countryman and former World No. 1 Marat Safin. This season, Khachanov, who won his first ATP World Tour title in October 2016 (Chengdu), made four quarter-finals – Barcelona, Lyon, Bastad and Hamburg – and the semi-finals of the ATP World Tour 500 event in Halle, the Gerry Weber Open. Khachanov, who turns 22 in May, can’t return to the 21-and-under Next Gen ATP Finals, but he’ll go for his second tour-level title in 2018.

Andrey Rublev, 20

The top seed at the Next Gen ATP Finals, who is already No. 39 in the Emirates ATP Rankings, showed all week why he could be a Top 10 player in the very near future. After a slow start in Milan – a five-set win against Italian wild card Gianluigi Quinzi and a straight-sets loss to Chung – Rublev gained his composure, beating Shapovalov and Croatian Borna Coric to make the first Next Gen ATP Finals championship match (l. to Chung).

Rublev sat atop the Milan bracket because of his stellar second half of 2017. The Russian won his maiden ATP World Tour title in Umag and made the US Open quarter-finals (l. to Nadal).

Hyeon Chung, 21

South Korea’s No. 1 entered the Next Gen ATP Finals under the radar: Chung was the second to last player to qualify directly for the tournament, and the trio of Russians, along with Shapovalov, had garnered much of the attention in the tournament preamble.

But that all changed once Chung took the court. The 21-year-old finished the week 5-0 and captured the title at the 21-and-under event. The sixth-seeded Chung had reached only a tour-level semi-final before Milan, but he beat Rublev twice – in group play and in the final – to celebrate the perfect ending to his 2017 season.

In Milan, Chung was at his best when he needed to bail himself out of trouble. The right-hander saved 77 per cent of his break points (34/44) in Italy.

The Rio Open presented by Claro performs a plethora of charity work, supporting five social projects that benefit hundreds of children and their families.

But this year, some of those children got a special treat. Six boys — a champion from each of the Futuro Bom Institute, Tenis na Lagoa, Tenis Solidario, Fabiano de Paula Tennis School and Arremessar Para O Futuro as well as one additional player — were provided the opportunity to travel to Florida and train for a week at the IMG Academy.

“I felt it as much as the kids,” said Marcus Fonseca, the founder of the Futuro Bom Institute. “I never had that opportunity at IMG and the Rio Open gave us the opportunity of a lifetime.”

The players who participated in the trip ranged from ages 11 to 18 — Valter Albuquerque (11), Caua Ostenta (11), Joao Gabriel Oliveira (18), Marcus Rocha (16), Ryan Souza (16) and José André (18) — and they were accompanied by the leaders of their respective projects and Rio Open Tournament Director Luiz Carvalho.

The group got to undergo a week of first-class training, including an exclusive practice with Nick Bolletieri himself. They also learned more about physical conditioning, strategy and mental conditioning. Off the court, the children got to play baseball, meet other tennis players at the academy and visit Walt Disney World to cap off the experience of a lifetime.

“The trip was really great!” the 11-year-old Albuquerque said.

“When the trip was over, everybody was really sad to separate,” Carvalho said. “But the truth is they are family forever, the Rio Open family, the winners family, and certainly we’re going to see each other many times here in Rio.”

The Rio Open’s effort was one of nine charitable causes nominated by ATP World Tour players, tournaments and alumni that received a $15,000 grant from ATP ACES For Charity in 2017.

The ability to quickly adjust to different surfaces and conditions is a necessity on the 64-tournament circuit. Here’s a look at some of the best performers in 2017 by surface this year:

Hard Courts (minimum 10 matches)
Roger Federer won five of his seven titles on hard courts in 2017, including his fifth Australian Open and three ATP World Tour Masters 1000 crowns. David Goffin, who recorded the most hard-court match wins this season, contested five hard-court title matches (2-3 record) for a .717 winning percentage.

Clay Courts (minimum 10 matches)
‘King of Clay’ Rafael Nadal recorded historic 10th titles at the Rolex Monte-Carlo Masters, the Barcelona Open Banc Sabadell and at Roland Garros. He also won a fifth Mutua Madrid Open trophy and now has a record 53 red dirt crowns. Dominic Thiem also excelled, compiling a 24-5 (.828) mark on the surface (1-2 record in finals).

Grass Courts (minimum 5 matches)
Federer reigned supreme on the grass, lifting his ninth Gerry Weber Open title and a record eighth Wimbledon crown. His lone loss on mown lawns came to Tommy Haas at the Mercedes Cup, following a two-month absence from competitive play. Marin Cilic, who fell to Federer in the Wimbledon final, also finished as runner-up in his third Queen’s Club Championships final (l. to Lopez).

Indoors (minimum 10 matches)
Jo-Wilfried Tsonga won three indoor crowns at the ABN AMRO World Tennis Tournament, the Open 13 Marseille and the European Open from four finals (Erste Bank Open 500). The Frenchman has an 11-8 mark in indoor finals (16-12 overall). Goffin and Grigor Dimitrov, who contested the title match at the Nitto ATP Finals, also performed strongly.