Rain delayed the start of day 10 of the US Open on Wednesday, prompting fears of a Monday finish for the fifth successive year. After more than six hours were lost on Tuesday, organisers were trying to squeeze in the remaining three women's quarter-finals, two men's quarter-finals and the three last-16 men's matches that had not been completed. Maria Sharapova and Marion Bartoli came out to warm-up on Arthur Ashe Stadium to resume their quarter-final, with the Russian star trailing 4-0, but heavy rain sent them back to the locker room before a ball was hit in anger.