Cornet, the No. 7 seed, bested the second-seeded Belgian 7-5, 7-6 (7-1) for her first crown since Budapest in 2008 and the second of her career.
The 22-year-old Cornet, playing in her second final of 2012, improved to 2-3 in championship tilts. She lost to Francesca Schiavone in the Strasbourg title match last month.
Wickmayer fell to 3-5 all-time in finals.
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