Serena Williams will take on defending champ Agnieszka Radwanska in the semi-finals of the Sony Open in Miami.
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Serena Williams continued her progress through the draw at the Sony Open on Tuesday, pulling back a 5-2 second set deficit to clinch a 6-3, 7-6(5) success in the quarter-finals against Na Li. When Serena was trailing in the second it looked like another three-setter could be on the way for the world No. 1. Things then got worse as a hip problem seemed to slow her down.
As it happens, Serena's injury concern turned out to be minor, and she had plenty of energy left over for a big victory leap after she clinched match point. She can now look forward to a meeting with defending champion and world No. 4 Agnieszka Radwanska.
Radwanska was pushed in the last eight by Belgium's Kirsten Flipkens. The thirtieth seed had threatened an upset by taking the first set and being neck and neck in the second at 4-4. Aga managed to finally break down Flipkens at this point, and she went on to win the match 4-6, 6-4, 6-2.
Looking ahead to semi-final, Serena will surely be considered the favourite. She holds a 4-0 head to head record against Radwanska and has dominated past meetings between the pairing. Even so, Radwanska is continually improving so it will be intriguing to see what she brings to the table. A win against the world No. 1 would be a landmark achievement for the Pole.