Mauresmo broke Dementieva twice in the third set, winning the opening game on a forehand error from Dementieva before increasing her lead to 4-1 after Dementieva sent a backhand wide.
Dementieva saved a match point at 5-2 to erase a break, but Mauresmo converted her second match point with a service winner for the former top-ranked player's first title since Antwerp, Belgium, in February 2007.
The two players traded breaks in the first set until the fourth-ranked Dementieva held her serve to take a 4-2 lead, but Mauresmo managed another break to draw level at 5-5. In the tiebreaker, Dementieva slammed a forehand winner on the line at 5-5 to get the first set point, but she wasted it with a backhand pass that sailed wide.
A forehand error from Dementieva at 7-7 gave Mauresmo her second set point, which she converted when Dementieva sent a forehand return into the net.
Dementieva roared back in the second, breaking Mauresmo for a 4-2 lead and securing the set when Mauresmo made two consecutive double faults.
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