The Barclays ATP World Tour Finals is back. Defending champion Roger Federer plays in the opening session of the 2011 Barclays ATP World Tour Finals against Frenchman Jo-Wilfried Tsonga on Sunday afternoon. Alongside them in Group B is French Open champion Rafael Nadal who faces Mardy Fish on Sunday evening.
In Group A home favourite Andy Murray takes on Spaniard David Ferrer on Monday afternoon while world No. 1 Novak Djokovic plays Tomas Berdych on Monday evening.