The Barclays ATP World Tour Finals get under way at The O2 arena on Sunday.
The end-of-year spectacular, now in its third year at the North Greenwich venue, sees the top eight male players of 2011 go up against each other.
Andy Murray joins world number one, Novak Djokovic, in Group A along with David Ferrer and Thomas Berdych.
Rafel Nadal, Roger Federer, Jo-Wilfried Tsonga and Mardy Fish make up Group B.
Players go head to head against the other members of their group, with the group-winners and runners-up advancing to the semi finals.
The tournament last throughout the week, with doubles matches daily too, and will conclude next Sunday.
Check ticket availability for the Barclays ATP World Tour Finals