Novak Djokovic defeats Tomas Berdych in the final of Dubai Open 7 - 5 6 - 3 . Serb , who won a fourth Australian Open title in January , now unbeaten in all matches . Serena Williams loses in semifinal of Brazil Tennis Cup to Russian ranked 28th in the world .
Novak Djokovic beats Tomas Berdych in the final of Dubai Open 7-5 6-3 . Serb , who won a fourth Australian Open title in January , now unbeaten in 18 matches . Venus Williams loses in semifinal of Brazil Tennis Cup to Russian ranked 109 in the world .