- World Rankings
Murray fired up for Djokovic showdown
The British No. 1 has been drawn in the same group as Djokovic for the season finale at the O2 Arena, where the pair will meet for a seventh time this season.
Djokovic won their most recent encounter in Shanghai, but Murray beat the Serb during the Olympics and in the final of the US Open, where he won his maiden grand slam title.
And Murray, who will also meet Jo-Wilfried Tsonga and Tomas Berdych in the round-robin stage, is relishing the chance to test himself against the world's best player once again.
"All the matches I have played with him this year have been incredibly close," Murray said in the Daily Mirror. "The match at the Olympics, for example. That could have gone either way. There were a lot of long games and in the second set especially he had chances.
"At the US Open, the Australian Open, our matches were so close. It was fun to watch for the crowd. I would not say either one of us has had especially the upper hand this year. They have been incredibly physical matches, very, very tough. I hope it is the same again this week.
"I relish these matches with Novak. But I am in a tough group and Tsonga and Berdych will also be difficult to beat."
Murray and Djokovic are being tipped to eclipse Roger Federer and Rafael Nadal as the next big rivalry in men's tennis, but the Scot says there are plenty of players who could be challenging at the top of the rankings.
"It is a bit too soon to say that," he said. "I think the rankings would suggest that it has not changed too much. Over the last few years, a lot of players have been at the top of their games. It's not just Roger and Rafa, it's Ferrer, Berdych, Tipsarevic. All of the guys that have been coming through in the last couple of years have been of a similar style of play.
"They have been huge guys, with big games, big serves, who have caused numerous upsets but have maybe lacked a bit of consistency to have made that final breakthrough to the top eight."
Women's rankings: 1. Victoria Azarenka (BLR), 2. Maria Sharapova (RUS), 3. Serena Williams (USA), 4. Agnieszka Radwanska (POL), 5. Angelique Kerber (GER), 6. Sara Errani (ITA), 7. Li Na (CHN), 8. Petra Kvitova (CZE), 9. Sam Stosur (AUS), 10. Caroline Wozniacki (DEN)
Men's rankings: 1. Novak Djokovic (SRB), 2. Roger Federer (SWI), 3. Andy Murray (GBR), 4. Rafael Nadal (SPA), 5. David Ferrer (SPA), 6. Tomas Berdych (CZE), 7. Juan Martin Del Potro (ARG), 8. Jo-Wilfried Tsonga (FRA), 9. Janko Tipsarevic (SRB), 10. Richard Gasquet (FRA)