Novak Djokovic

Roger Federer came back from a lengthy injury layoff in 2017 to win seven titles, including two Grand Slams.

Djokovic and Murray ended their 2016 season after Wimbledon owing to injury and will return to action in January 2018.

Marat Safin has questioned the quality of the younger generation after Nadal and Federer dominate 2017 season.

Radek Stepanek announced his retirement earlier this month owing to fitness issues and will now continue his tennis career as a coach.

Former world number one Marat Safin believes that while Andy Murray will have some success against Rafael Nadal and Roger Federer, he does not see Novak Djokovic faring as well.

Federer and Nadal struggled with injury in 2016 with the former playing a limited schedule to stay fit in 2017. Djokovic and Murray ended their 2017 season early owing to injury.

Lleyton Hewitt has picked Roger Federer as the favourite over Rafael Nadal for the upcoming 2018 Australian Open in January.

Norman teamed up with Wawrinka as a coach in 2013 and together they spent four years, winning three Grand Slam titles.

Radek Stepanek, who announced his retirement earlier this month, could join Novak Djokovic's coaching team alongside Andre Agassi.

Carlos Moya has warned Novak Djokovic and Andy Murray that emulating Rafael Nadal and Roger Federer will not be as easy as it looks upon their impending returns.

Rafael Nadal has been backed to have a perfect end to 2017 as he returns for the Mubadala World Tennis Championship in December where a meeting with Novak Djokovic could happen.

Roger Federer will begin his campaign at the Hopman Cup, while Rafael Nadal and Novak Djokovic will get theirs underway in Brisbane and Doha, respectively.

Grigor Dimitrov won the ATP Tour Finals in London while runner-up David Goffin beat Nadal and Federer on his way to the finals.

Former British number one Greg Rusedski believes Roger Federer will be rueing his missed chance of winning the ATP Finals after the absence of Rafael Nadal and Novak Djokovic.

World number three Grigor Dimitrov is expecting an interesting 2018 with the returns of Djokovic and Murray while he is also aiming for a Grand Slam following his ATP Finals win.

Current world number four Dominic Thiem believes the return of Novak Djokovic and Andy Murray will cause a shift in the ATP rankings.

With the expected return from injury of Novak Djokovic, Andy Murray, Stan Wawrinka, Kei Nishikori and more, Roger Federer is expecting an "epic" start to the new year.

Federer had a disappointing end to the 2017 campaign, losing the ATP World Tour semi-finals to David Goffin.

Rafael Nadal saw off the challenge from Federer and claimed the year-end number one ranking for the fourth time in his career.

British tennis has adopted an extra week in the calendar - but interest in the ATP World Tour Finals is diminishing.

Former world number one Mats Wilander believes despite the lack of success for the next generation, the experience of playing Rafael Nadal and Roger Federer will prove crucial.

Roger Federer has continued what has been a remarkable year after becoming the top prize money in all of individual sports.

Federer backed Zverev, Shapovalov and Kyrgios to emulate members of the current big four after his win over Zverev at the ATP Finals in London.

Roger Federer holds the record for the most number of Grand Slam titles and number of weeks as the No.1 but has a poor head-to-head record against his longtime rival Rafael Nadal.

Marin Cilic has given his assessment on whether Rafael Nadal and Roger Federer benefited from the 2017 absences of Novak Djokovic and Andy Murray.

Hip and elbow injuries kept both players out of top form for a major part of the year.

Djokovic started the year as the number two ranked player in the world but he has currently fallen to number seven after what has been a poor, injury-ridden year.

Former world number one Pete Sampras believes only Novak Djokovic was capable of stopping Roger Federer from attaining Wimbledon glory earlier this year.

Novak Djokovic called time on his 2017 season after retiring in the quarter-finals at Wimbledon and will return to action in 2018.

Former British number one Greg Rusedski believes Roger Federer's change in racket helped him compete with the likes of Rafael Nadal, Novak Djokovic and Andy Murray.