The ninth-seeded Kerber toppled the second-seeded Bartoli 7-6 (7-3), 5-7, 6-3 at Stade Pierre de Coubertin, as the 24-year-old German prevailed in 2 hours, 39 minutes. Kerber was the beneficiary of 10 double faults by a sloppy Bartoli.
Kerber is now 2-3 lifetime against the world No. 7 Bartoli, who was the Wimbledon runner-up in 2007.
The 27-year-old Bartoli dropped to 7-10 in her career finals, while the 27th- ranked Kerber improved to 1-1, with the loss coming in Bogota in 2010.
Kerber, who is the first German to win this tournament since the legendary Steffi Graf turned the trick back in 1995 and was a surprise U.S. Open semifinalist back in September, earned $107,000 this week.