French Open spotlight
Key matches today: Victoria Azarenka vs. Dinah Pfizenmaier; Roger Federer vs. Adrian Ungur; Gilles Simon vs. Brian Baker; Agnieszka Radwanska vs. Venus Williams; Novak Djokovic vs. Blaz Kavcic; Sam Stosur vs. Irina Falconi; Juan Martin del Potro vs. Edouard Roger-Vasselin; Sara Errani vs. Melanie Oudin; Dominika Cibulkova vs. Vania King; Bethanie Mattek-Sands vs. Sloane Stephens. TV (ET): Today 5-10 a.m., ESPN2; 10 a.m.-7 p.m., Tennis Channel. Thursday — 510 a.m., ESPN2; 10 a.m.7 p.m., Tennis Channel. At tennis.usatoday.com