WASHINGTON, April 6 ― US top seed Jessica Pegula saved four match points to eliminate two-time Australian Open champion Victoria Azarenka yesterday and advance to the WTA Charleston Open semi-finals.

Pegula squandered four match points at the clay court event before denying Azarenka's four chances to advance and finally captured a 6-4, 3-6, 7-6 (9/7) victory after two hours and 36 minutes when Azarenka hit a forehand service return long.