Tennis Channel Court Report: Ahn upsets Stosur at Volvo Car Open 0 04 Apr 2018 02:01 USATODAY (Tennis Top Stories) Kristie Ahn recorded the first big upset at the Volvo Car Open, taking down Samantha Stosur in straight sets in Charleston. Caroline Garcia and Daria Kasatkina, the defending VCO champion, also picked up victories.