Serena wins fiesty final

Serena Williams retained the Family Circle Cup on Sunday night after seeing off Jelena Jankovic in a fractious encounter in Charleston.

The pair exchanged words across the net at the start of the second set and the verbals appeared to fire up Williams, who upped her game to cruise to a 3-6 6-0 6-2 triumph.

Jankovic looked surprisingly comfortable in the first set as Williams failed to hit the sparkling heights she reached in her thrashing of sister Venus.

But the complexion of the match changed following the spat in the first game of the second.

Serving at 40-15, Jankovic was halted midway through her delivery when Williams put up her hand to indicate she was not ready despite being in the customary crouch position.

The American told umpire Kader Nouni "she's gotta wait for me" to which Jankovic responded: "How long do I have to wait?"

Williams said: "Until I'm ready. I don't play slow."

Jankovic indicated Williams was in position to receive but the world number one snapped: "Honestly, you got a problem. I'm not the one."

The incident is not the first time Williams has had issues with Jankovic, who is regarded as one of the fastest players on tour.

She held up her hand to slow down the Serbian in their last meeting, in Rome in 2010, and also had a word at the net after the match.

The exchange undoubtedly sparked Williams into life and she ran through the second set and, although the third was more competitive, the top seed had too much firepower for Jankovic, winning in one hour and 55 minutes.