21:00TennisUS Open Final - Serena Williams v Naomi OsakaBBC Radio 5 Sports Extra Duration: 6 hours Sat 8th Sep 2018, 21:00 on BBC Radio 5 Sports ExtraLive tennis commentary of Serena Williams v Naomi Osaka in US Open women’s final at Flushing Meadows, New York.GenresSportTennisSeriesTennis Source: BBC Online