Jelena Jankovic toppled world number one Dinara Safina to claim her second WTA Tour title of the season in Cincinnati.

The fifth seed capitalised on an error-strewn performance from Safina to claim the Western and Southern Financial Group Open, winning the final 6-4 6-2.

After Jankovic had taken the first set courtesy of the only break of serve, the Serb gave her fans a scare when she called for the trainer.

However, although Safina tried to dig deep and hit back, her serve was letting her down - she would finish the match having won only 42 per cent of points behind her own delivery.

Jankovic broke the Safina serve three times in the second set as she pressed on for a victory which leaves her in good shape ahead of the US Open, which begins on August 31.

Afterwards Jankovic said: "When I did the interview before the match, Pam Shriver asked me how I felt today after such a tough one last night. I said I wanted to believe I wasn't tired, that I'm fresh and ready to play.

"I was feeling sore this morning, but when I went on the court I felt fine. I'm really pleased I was able to play well and beat the number one player in the world. This is very good for my confidence going into Toronto and the US Open."

Safina added: "I was very confident stepping onto the court, but then I was just totally off. There were a few moments were I was starting to get into the match, but she was using some good shots and hitting very close to the lines, also down the lines. She played some great tennis today."