Stosur suffers shock defeat at Citi Open

Top seed Samantha Stosur saw her Citi Open campaign go up in smoke on Friday as she lost to American wildcard Jessica Pegula 6-7 (4), 3-6 in the quarter-finals. 

Stosur will be extremely disappointed about the loss as she had a great opportunity to reach the semi-finals and go on to capture her first title of the year.

Pegula will face compatriot Lauren Davis in the semi-finals after she defeated Camila Giorgi 6-4, 6-4.

Meanwhile, seventh seed Yanina Wickmayer downed fourth seed Kristina Mladenovic 4-6, 6-3, 6-4 to set up a semi-final clash with sixth seed Yulia Putintseva, who triumphed over Risa Ozaki 6-4, 6-2.