Venue: Flushing Meadows, New York, Dates: 31 August-13 September
Coverage: Live radio and text commentary on every Andy Murray match plus selected others.
Serena Williams was two games from defeat before recovering to beat Bethanie Mattek-Sands and keep her Grand Slam hopes alive at the US Open.
The world number one came back to win 3-6 7-5 6-0 in round three at Flushing Meadows.
Williams, 33, is aiming to become the first player to win the calendar Grand Slam since 1988.
Men's top seed Novak Djokovic progressed, with former champion Rafael Nadal to play later on Thursday.