|Venue: Flushing Meadows, New York, Dates: 31 August-13 September|
|Coverage: Live radio commentary on selected matches; live text on all singles matches.|
Serena Williams must wait until Friday to continue her pursuit of a calendar Grand Slam after the women's semi-finals at the US Open were postponed with heavy rain forecast.
The matches will now take place at 11am local time (16:00 BST) on Friday.
Williams will face Roberta Vinci after second seed Simona Halep meets Flavia Pennetta in the other last-four match.
The men's semi-finals will take place after the conclusion of the women's matches at 22:00 BST.
The rainy conditions did not prevent the men's doubles semi-finals from going ahead as scheduled on Thursday.
Great Britain's Dom Inglot and his partner Robert Linstedt were beaten 7-5 6-2 by French duo Nicolas Mahut and Pierre-Hugues Herbert, but Jamie Murray and his Australian partner John Peers won their semi-final later on.
Murray and Peers saved a match point to beat Americans Steve Johnson and Sam Querrey 6-4 6-7 (2-7) 7-6 (9-7) and take their place in Saturday's final.