Novak Djokovic, Roger Federer advance

[truebluefan]

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.