Novak Djokovic

The likes of Andy Murray, Novak Djokovic, Stan Wawrinka and Kei Nishikori will all feature in the Australian Open while Serena Williams is expected to defend her title.

Andy Murray's ex-coach Miles Maclagan believes it will take quite a while for the next generation to emulate the success of Roger Federer, Rafael Nadal and Novak Djokovic.

Carlos Moya has warned against writing off Djokovic after the Serb ended his season early due to injury.

The future stars of tennis have underperformed in Grand Slams.

Djokovic has taken time off since Wimbledon to recover from an elbow injury.

Nadal and Federer have won five titles apiece including two Grand Slams each in 2017.

Federer has lost just four times in 43 matches in 2017 winning five titles along the way.

Nadal achieved the men's singles number one ranking for the first time since July 2014.

Djokovic and Murray are both expected back in tennis action in 2018.

Nadal won his 16th major title at the 2017 US Open and is 3 behind Federer.

Wilander believes there is a big difference between Murray and the rest of the Big Four.

Kyrgios is known for stepping up whenever he faces a big name.

Nadal did not encounter any top players along the way to US Open title, says Toni Nadal.

Nadal breezed through the competition to win his third US Open title.

Both Djokovic and Murray are expected to be back in action in 2018.

Zverev believes playing good tennis for so many years has led to recent withdrawals.

Nadal is currently world number one for the first time since July 2014.

Murray has not played since Wimbledon due to a hip injury.

Two-year rankings would allow more players to take breaks and rest up.

Nadal can become world No1 if he makes the semi-finals at the Rogers Cup this week.

The Swiss number two is "extremely disappointed" about not being able to defend title at Flushing Meadows.

Federer won his 19th men's singles Grand Slam title at Wimbledon this year.

Thiem is one of many young players who are expected to be the new generation.

Injuries and poor form have disrupted Murray's year so far.

Nadal is just 285 points behind world number one Andy Murray.

Former world number one has never previously missed a Grand Slam, but will not play at next month's US Open.

Djokovic had to retire from his Wimbledon quarter-final match against Tomas Berdych due to injury.

Federer has won 5 of the 7 events he has played in 2017.

Demands on the sport's finest-ever competitors is greater than ever - when we should be looking after them.

Federer has had a career resurgence this year with five titles including two Grand Slams.