Radwanska battles to win over Li

Agnieszka Radwanska goes through to the semi-finals at Wimbledon after beating Li Na 7-6 (7-5) 4-6 6-2 in a hard-fought encounter on Centre Court.

Radwanska, last year's runner-up, recovered from 5-3 down in the tie-break to win the first set, with Li squaring the match in the second, before Radwanska had a medical timeout to get her thigh strapped.

The Pole then took the third set in a match that included two rain breaks and finished under the Centre Court roof.

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