New York, USA, 9 September 2012 | AFP

Saturday’s scheduled US Open women’s singles final between Serena Williams and Victoria Azarenka has been postponed until Sunday because of forecast heavy rains and storms, organisers announced.

“The weather forecast for this evening is calling for storms with heavy rain and high winds,” said a tournament spokesman.

Play on Saturday was already delayed by 90 minutes following heavy morning rain and a tornado warning which had been issued for the New York area.

The first men’s semi-final between Andy Murray and Tomas Berdych got underway 90 minutes late on Arthur Ashe Stadium.

The second semi-final featuring defending champion Novak Djokovic and David Ferrer went ahead as scheduled.

“We are continuing the day session as scheduled and will closely monitor the weather for the remainder of today’s day session,” added the spokesman.