Radwanska struggles past Jankovic

Agnieszka Radwanska came through a topsy-turvy battle against Jelena Jankovic to reach the semi-finals of the at the BNP Paribas Open.

Second seed Radwanska won a marathon opening set only for Jankovic to fight back, and the Serbian then recovered from 0-4 to level in the decider but Radwanska pulled away again to win 7-5 2-6 6-4 at Indian Wells.

The Pole next meets Simona Halep, who was the first woman through to the last four after continuing her fine run of form with a 6-2 6-2 win over Casey Dellacqua.

The sixth seed had to battle back from a break down in the final set to defeat Eugenie Bouchard in the fourth round, and, although she was a much stronger favourite for this match, she said: "I had no pressure, and I was more relaxed than yesterday.

"I said that if I'm in the quarter-finals I have just to enjoy what I can do today, so I tried, and everything was going very well."

Halep is guaranteed to rise to world number five whatever the result of her semi-final, meaning she will become the highest-ranked Romanian in the history of the WTA.