Troicki had taken a 0-15 lead on Murray's serve in game six, but the point was ruled a let due to the ball boy's gaffe.
The No. 15 seed from Serbia was stunned, kneeling on the court with his hands covering his mouth. He went on to lose the ensuing point, but he won the game.
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More:French Open 2011 2011 French Open Ball Boy Viktor Troicki Viktor Troicki Ball Boy Viktor Troicki
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