Unseeded Sloane Stephens of the United States upset No. 23 Petra Cetkovska of the Czech Republic 7-6 (6), 4-6, 6-3 Wednesday to reach Wimbledon's third round in her debut at the Grand Slam tournament.
The 19-year-old American, who is based in Coral Springs, Fla., is coming off her first run to the fourth round at a major at the French Open.
The match Wednesday was an up-and-down contest. The 59th-ranked Stephens was broken at love while serving for the first set at 5-4. She wound up needing to save five set points before winning the opener. After dropping the second set, Stephens came through in the third.