The Belgian quickly raised to a 4 - 1 lead in the second set .
Wozniacki fought back to tie the match at five and broke Clijsters to go up 6 - 5 and then sealed the set on her serve .
The Belgian quickly raised to a 4 - 1 lead in the second set but Wozniacki fought back to tie the match at five and broke Clijsters to go up 6 - 5 and then sealed the set on her serve .