Novak Djokovic

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.

Sampras was hoping that his record of 14 Grand Slam titles would last longer than the seven years it took Federer to eclipse his score.

The 16-time Grand Slam winner had to withdraw from the Paris Masters after feeling a recurrence of the injury which put his participation in massive doubt.

Djokovic last featured competitively in his Wimbledon quarter-final clash with Tomas Berdych. The Serbian ace retired midway through the match due to an elbow injury.

Nadal can become the most successful ATP 1000 Masters Series player if he wins his first title in Paris as he is currently tied with Djokovic at 30 titles.

Roger Federer has reclaimed his spot as the top prize earner in tennis as he overtook Novak Djokovic and closed in on becoming the first player to make $110m in career earnings.

Former world number one Novak Djokovic is looking to change his fortunes in 2018 as he targets more Grand Slam success after a poor injury-ridden 2017.

Federer does not believe he has set a trend that sees many a top player taking lengthy injury breaks in order to emulate the Swiss star's successful 2017 campaign.

Roger Federer could be set to regain his spot over Novak Djokovic as the top prize earner in tennis, should he win any of the next three events.

Novak Djokovic is looking forward to getting back to winning ways when he makes his comeback from injury in 2018.

Former British number one Greg Rusedski believes Andy Murray will return to challenge for major honours but is concerned about Novak Djokovic.

Ex-coach Mark Petchey says the competition from Andy Murray, Novak Djokovic and Stan Wawrinka has made Rafael Nadal and Roger Federer even better players.