Wild card Alison Riske ousts ailing Petra Kvitova to advance at U.S. Open

The 2013 U.S. Open is all about firsts for 23-year-old Alison Riske. The American wild card knocked out 2011 Wimbledon champion Petra Kvitova 6-3, 6-0 on Saturday to advance to the fourth round of a Grand Slam tournament for the first time. Riske produced a composed performance in her first victory against a top-10 player, though the seventh-seeded Kvitova was struggling with a virus that had kept her in bed Friday.Read More…