(3) Novak Djokovic
- DOB: 22/05/1987
- Nationality: SRB
- Became Pro: 2003
- Height: 1.90
The Serbian, who won the 2008 Australian Open crown, has been a fixture in the world's top four for over three years but has never seemed to be able to hit top form when it really matters.
Consistency has not been a problem - he has reached at least the quarter-finals at 13 of the last 15 Grand Slams - but Djokovic has struggled to get over the finish line at the biggest tournaments.
He did enjoy a strong run of form over the second half of last season which included reaching the semi-finals at Wimbledon and falling to Nadal in the US Open final.
Djokovic also enjoyed a triumphant end to the year as he was part of the Serbia side that won the Davis Cup by defeating France in December.
The 23-year-old will be hoping that the good run of form continues into the New Year as he attempts to improve on two straight quarter-final losses in Melbourne since his triumph three years ago.
But after his resurgence in the latter part of 2010, including a fine win over Roger Federer at Flushing Meadows, he will be once again tipped by some to break the dominance of the top two players.
Ten-year Grand Slam History