Serena Williams starts defense of WTA Championship title with victory over Angelique Simon . I 've been working really hard since the Open World No.2 Victoria Azarenka also a win on Tuesday beating Sara Black 7 - 6 , 6 - 2 . Stanislas David crashes out of the ATP Tour 500 event in Basel , Switzerland .
Serena Williams starts defense of WTA Championship title with victory over Angelique Simon . World No.2 Victoria Azarenka also a win on Tuesday beating Sara Black 7 - 6 , 6 - 2 . Stanislas David crashes out of the ATP Tour 500 event in Basel , Switzerland .