Novak Djokovic, Roger Federer advance
DUBAI, United Arab Emirates -- Novak Djokovic defeated fellow Serb Janko Tipsarevic 6-1, 7-6 (6) Thursday to set up a Dubai Championships semifinal with Andy Murray, who he beat in a marathon five-setter at the Australian Open last month.
Roger Federer will face Juan Martin del Potro in the other semifinal at Aviation Club. Del Potro beat Jo-Wilfried Tsonga 7-6 (1), 6-2 for the second time in two weeks.
Murray advanced by defeating fifth-seeded Tomas Berdych 6-3, 7-5. Federer ...
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