Jo-Wilfried Tsonga stuns Mardy Fish at ATP Finals

Jo-Wilfried Tsonga beats Mardy Fish 7-6 (7-4) 6-1 in the ATP World Tour Finals at London's O2 Arena.

The Frenchman survived a late wobble to edge the first set and then came from a break down to win six straight games in a ruthless second.

The win boosts Tsonga's hopes of reaching the knockout stage, as he prepares to face Rafael Nadal in his final Group B match on Thursday.

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