Barthel cracks the Vinci code
Fifth seed Roberta Vinci was a second-round casualty at the Open GDF Suez in Paris after being knocked out by Mona Barthel.
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Vinci needed just 52 minutes to sweep aside Simona Halep in her opening match on Tuesday and the Italian looked set to make further progress after winning the first set against Barthel 24 hours later.
However, the 22-year-old German hit back to claim victory 4-6 6-1 6-3 and she will now face third seed Marion Bartoli in the quarter-finals.
French number one Bartoli saw off the challenge of American Christina McHale 7-5 6-1 in her second-round match.
In first-round action, sixth seed Lucie Safarova got off to a winning start but had to do it the hard way before securing a 2-6 6-1 6-1 triumph over Spaniard Lourdes Dominguez Lino.
Other first-round victors on Wednesday were Yanina Wickmayer, Kiki Bertens and Magdalena Rybarikova, whose 6-4 3-6 6-3 win over fellow qualifier Virginie Razzano lasted 12 minutes short of three hours.
Second seed Petra Kvitova, the 2011 champion, safely negotiated her second-round clash with Swiss qualifier Stefanie Voegele, the Czech winning 7-6 (7/5) 6-3.