Andy Murray’s title defence at the ATP Montreal Masters collapsed on Tuesday as the off-form Scot was crushed 6-3, 6-1 in his opening match by South African Kevin Anderson. The two-time defending champion was bundled out in 69 minutes in his second-round start. While Murray’s Montreal campaign ended abruptly, top-seeded Novak Djokovic couldn’t even get his going as rain rolled into the city in the early evening and eventually forced the postponement of Djokovic’s scheduled second-round opener against Russian Nikolay Davydenko. More poor weather was predicted for the area on Wednesday, when second seed Rafael Nadal and two-time Canadian winner Roger Federer are both due on court for their first matches in the US Open tuneup. When he does get on court — now scheduled for Wednesday — Djokovic will be playing his first match as a reigning world number one. He has ascended the rankings summit with a stellar season in which he boasts a 48-1 win-loss record with eight titles. He and former top-five regular Davydenko have not played since 2009. Djokovic won the Canadian trophy in 2007 and has never lost in Canada prior to the quarter-finals with a 12- record in the country. Before the storms rolled in, Richard Gasquet produced a repeat of his July Davis Cup victory over Florian Mayer as he defeated the German 6-3, 6-2.