Tomas Berdych got his ATP World Tour Finals campaign back on track after seeing off a dogged Janko Tipsarevic in London on Wednesday.

The Czech shrugged off a sluggish start to battle back from a set down to beat Tipsarevic 2-6, 6-3, 7-6(6) at the O2 Arena.
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Tipsarevic, playing his first match at the O2 Arena after his call-up following home favourite Andy Murray's withdrawal from the competition, showed no signs of nerves as he grabbed an early break, but Berdych, who came within a point of beating Djokovic on Monday, bounced back to boost his chances of qualifying for the semifinals.
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