Venus Williams played a brand of tennis at the Family Circle Cup that would be hard for anyone to overcome, including little sister Serena.

Venus Williams looked strong in her first clay-court tournament since 2010, defeating Jelena Jankovic 7-5, 6-0 to advance into the third round Wednesday night and continued her trek to a semifinal showdown with Serena. Don't go planning the latest all-Williams match, yet, since Venus says she's still testing her endurance after the onset of an autoimmune disease that sidelined her for more than six months.