Varvara Lepchenko became the fourth American woman to reach Wimbledon's third round by beating 31st-seeded Anastasia Pavlyuchenkova of Russia 7-6 (4), 6-4 on Thursday.
Lepchenko joins sixth-seeded Serena Williams, 28th-seeded Christina McHale and unseeded Sloane Stephens to make the last 32 at the All England Club.
The 53rd-ranked Lepchenko is coming off her best career Grand Slam result by reaching the fourth round at the French Open.
She will play 24th-seeded Francesca Schiavone of Italy in the third round.
Lepchenko, who was born in Uzbekistan, has lived in the United States since 2001 and became an American citizen in September.