Indian ace Leander Paes and his partner Lukas Dlouhy suffered a straight-set defeat against American Byran brothers Bob and Mike to be out of contention for a semi-final spot in the ATP World Tour Finals.

Paes and Dlouhy, winners at Roland Garros and the US Open this season, had lost their first Group B doubles match to Kubot and Marach and are now out of contention for the semi-finals after their 3-6, 4-6 loss to the Bryan brothers last night.

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Leander Paes