Berdych wins crucial tie-break

Watch the dramatic final moments as Tomas Berdych defeats Janko Tipsarevic in a third-set tie-break after a close encounter between the pair at the ATP World Tour Finals in London.

Czech world number seven Berdych emerged victorious after saving a match-point in a closely-fought game, eventually winning 2-6 6-3 7-6 (8-6) to enhance his chances of progressing to the last four from Group A.

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