Harriet Dart thrills the natives with Wimbledon win over compatriot Katie Boulter

England's Harriet Dart went from despair to joy as she defeated compatriot Katie Boulter in a nail-biting encounter to reach the third round of Wimbledon.

Dart was in tears at the back of the court when she trailed 6-2 in the deciding tie-break but she clawed her way back to win 4-6 6-1 7-6 (10/8) after two hours and 56 minutes of tension on Court One.

It was a thoroughly merited win for Dart and one of the biggest of her career, with the 27-year-old into the last 32 here for the second time, where she will meet China's Wang Xinyu, who upset fifth seed Jessica Pegula.

The US Stars and Stripes fluttered feebly for Pegula as she was ousted by Wang 6-4 6-7(9) 6-1 on American Independence Day.

Wang blasted 38 winners which, combined with 33 unforced errors from Pegula, secured victory and a third round match-up against Dart.

For Pegula the loss was an ignominious crash back to earth on the back of some great form heading into the grasscourt Grand Slam.

In the Berlin lead-up event she saved five match points in the final to win her first career grass title with victory over Anna Kalinskaya and had high hopes of improving on last year's quarter-final finish here.