Murray and Butorac will now go their separate ways

Murray, Britain's number one doubles player, and his American partner lost 7-5 6-3 to Amer Delic and Justin Gimelstob of the United States.

Murray, 21, and Butorac won three titles together but the pair have won only two matches since Wimbledon.

The Briton is still in the mixed doubles with Liezel Huber.