Barry's best bets
Sky Sports pundit Barry Cowan will join us each day of the ATP World Tour Finals to provide his views on the day's action.
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The season-ending tournament, taking place at London's O2 Arena, features the world's top players of 2012, including Andy Murray, Roger Federer and Novak Djokovic.
The former British star, part of the Sky Sports team at the event, will have a charity bet with Sky Bet each day - all money won will be donated to Cancer Research.
For Friday's action, Barry's charity bet is:
Cowan said: "Murray played great on Wednesday and will be positive in his chances of recording a sixth successive win over Tsonga, while Djokovic should have enough to overcome Berdych but, with the Czech needing to win to keep his chances alive, I expect it to go three sets."