Serena WIlliams came from a set down to reach the semi final of Wimbledon with a 3-6 6-2 6-3 defeat of Victoria Azarenka.

She will next face Maria Sharapova in the last four, after the Russian defeated Coco Vandeweghe 6-3 6-7  6-2.
Williams has won all but one of their 17 previous meetings, and the five-time champion is now a huge favourite to make it 21 Grand Slams and move to within one of Steffi Graf’s open-era record.
In the other quarter final matches, Agnieszka Radwanska beat Madison Keys in three sets to reach the semi-finals at Wimbledon for the third time.
The 26-year-old Pole, finalist in 2012, overcame Keys 7-6 3-6 6-3.
Radwanska, the 13th seed, edged a tight first set and secured the decider with the only break after the 20-year old, responded.
Radwansaka is delighted to get to the semi final.
She will next face Spain’s 20th seed Garbine Muguruza, who beat Timea Bacsinszky 7-5 6-3.