New Zealand's Marina Erakovic and Zimbabwe's Cara Black have knocked out the ninth-seeded Czech-German pair of Kveta Peschke and Anna-Lena Groenefeld in the second round of the doubles at the French Open in Paris.
The unseeded Black and Erakovic won 6-3 6-4 and now face a tough third round match against Italian 2010 singles champion Francesca Schiavone and her Australian partner Samantha Stosur.
