Top-seeded Kei Nishikori reaches Mexico Open semifinals
Harrison's brother Christian a "month or month and a half" away from playing
Robredo beats Olivo to reach quarters in Argentina Open
Venus, Azarenka set up Qatar Open semifinal
Murray loses to 18-year-old Coric, 6-1, 6-3, in Dubai quarterfinals
Tournament of Champions Roy Emerson vs. Yevgeny Kafelnikov
The Week in Preview: Dubai, Doha, Acapulco, Buenos Aires
PODCAST: Discussing Dubai; Nadal's New Approach
34-year-old Venus Williams continues to turn back the clock.
The best may be yet to come for eight-time major champ Djokovic.