(CNN) -- Defending champion Serena Williams edged towards another milestone with the 49th WTA Tour title of her career on Sunday, coming from behind to beat Jelena Jankovic in the final of the Family Circle Cup in South Carolina. The world No. 1, who is seeking to become only the 10th woman to have reached a half-century, triumphed for the third time on the green clay at Charleston as she won 12 of the last 14 games. The American, who had a similar run in vanquishing Maria Sharapova to claim a record sixth Miami title last weekend, posted a 3-6 6-0 6-2 victory in just under two hours.
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World No. 1 Serena Williams defends her title at the Family Circle Cup in Charleston
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American rallies to defeat Jelena Jankovic 3-6 6-0 6-2 in Sunday's final
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Serbian's compatriots through to semifinals of Davis Cup, beating U.S. in Idaho
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Champion Czech Republic team will play Argentina in the other semifinal
"After that I just got really relaxed and was like, '@placeholder, you have to chill out and not get crazy and if you win, great.