World number 45 Mona Barthel of Germany upset the odds to beat top seed Sara Errani of Italy 7-5, 7-6 (7/4) in the final of the Paris Open on Sunday. Barthel seemingly had the edge on several occasions in the French capital only for seventh-ranked Errani to reel her opponent back in before the German finally ended Errani's dogged resistence after one hour and 56 minutes. The title was Barthel's second on the WTA Tour -- and her first at a Premier event -- following her maiden triumph in Hobart a year ago.