20:00TennisSloane Stephens v Anastasija SevastovaBBC Radio 5 Sports Extra Duration: 4 hours Tue 5th Sep 2017, 20:00 on BBC Radio 5 Sports ExtraLive tennis commentary from the US Open in New York, featuring Sloane Stephens v Anastasija Sevastova in the women's singles quarter-finals.GenresSportTennisSeriesTennis Source: BBC Online