Not the best at math? Don't worry tennis fans, we've got you covered with this handy sheet of Group B World Tour Finals semifinal qualification scenarios.
The Swiss maestro's net game is simly sublime on this point against hard-charging Kei Nishikori in London.
Marin Cilic's bad day on Monday had a lot to do with Novak Djokovic's good day.
The 14-time Grand Slam champion hopes to be back on the court in five weeks.
Doubles takes center stage at the ATP World Tour Finals, and the results can be quite scintillating.
The race for No. 1 is in Novak Djokovic's hands in London. Here's what he needs to take it home.
When you've got Knoxville, who needs London? Certainly not Hunter Reese.
