Darkness halted Andy Murray's bad-tempered French Open survival battle with Radek Stepanek while Stan Wawrinka avoided becoming the first defending champion to lose in the first round on Monday. Second seed Murray dropped the first two sets 6-3, 6-3 before taking the third 6-0. He then edged ahead with a break in the fourth at 4-2 when play was halted in the gloom of Court Philippe Chatrier at 2123 (1923GMT). At 37, Stepanek is bidding to be the oldest winner of a singles match in Paris since Jimmy Connors in 1991. And he appeared to be cruising to a shock win over the three-time semi-finalist when he swept the first two sets.