Britain's Davis Cup captain Leon Smith admits he has a tough few days ahead before deciding who will take the second singles berth in next week Davis Cup Final.
Players put the tournament at the top end of their priority list. What is it that makes this it so special? The answer is the history that surrounds it.
Novak Djokovic is still the favourite to claim a 4th consecutive ATP World Tour Finals title according to Roger Federer, despite ending his winning streak.
Rafa Nadal's late-season resurgence continued at the ATP World Tour Finals when he beat wayward French Open champion Stanislas Wawrinka to open his account.