Top-ranked Rafael Nadal and World No. 4 Andy Murray moved on to the quarterfinals of the Cincinnati Masters. Both got some help with their matches on the line. Third-ranked Novak Djokovic advanced by beating David Nalbandian 6-1, 7-6 (7).Nadal survived a set point in the second-set tiebreaker, then surged to a 5-7, 7-6 (6), 6-2 victory over France's Julien Benneteau. Murray took advantage of Ernests Gulbis' erratic shots -- especially in the tiebreaker -- for a 6-4, 3-6, 7-6 (4) victory.
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