The 26-year-old Simon, who had also won in Sydney in January, had knocked out top seeded compatriot Gael Monfils in the quarterfinals and will rise to 11 in the world when the new rankings are released on Monday.

"I had to play my best tennis to win such a tough final," said Simon, after his fourth victory in three sets at the tournament.

The bad weather in the German city meant that the roof over the Rothenbaum Tennis Center was closed as Simon became the first Frenchman since Henri Leconte 25 years ago to win the title.

In Baku, Russian top seed Vera Zvonareva clinched the inaugural $220,000 WTA Baku title on Sunday, beating seventh-seeded compatriot Ksenia Pervak 6-1, 6-4 in the final.

World No. 3 Zvonareva took one hour and 23 minutes to record her second win over the 20-year-old Pervak in as many meetings and claim her 12th career title.

"I'm happy to be the first winner of this new WTA tournament," Zvonareva said.

"I hope it was a spectacular final. It was hard to play because of the hot weather, while Ksenia played really well especially in the second set." Zvonareva, 26, broke her opponent's serve twice for a commanding 4-0 first set lead before Pervak chalked up her first game.

After making another break to take the opening set in 34 minutes Zvonareva then produced three more breaks against two for Pervak in an untidy second set.

Zvonareva received a crystal trophy and a $37,000 check, while runner-up Pervak, who was playing in her first career final, pocketed $19,000.

In Atlanta, Americans Mardy Fish and John Isner both won their semifinals to set up rematch of last year's title match at the Atlanta Open on Saturday.

Top seed and defending champion Fish easily advanced past his promising 19-year-old compatriot Ryan Harrison 6-2, 6-4 in their last four encounter.

Fish, who did not drop serve while breaking Harrison on three occasions in a match that lasted just one hour and 19 minutes, said he was expecting a tough challenge from Isner on Sunday.

Big-serving Isner prevailed over Luxembourg's Gilles Muller 7-5, 6-7, 6-1 in the other semifinal, firing down 28 aces in the process.

After dropping the second set tiebreaker to close out the match, Isner seized control by winning the first five games of the third set.

Isner will be attempting to win his second straight tournament, having won the Newport Open two weeks ago.

"I've been waiting on this feeling for about four to five months," said Isner. "Now that I have it, I don't want to let it go."