Djokovic comfortably beat Frenchman Jeremy Chardy 6-4, 6-4, but told the chair umpire during the match he was becoming affected by the substance being smoked by someone in the crowd.

"Someone is smoking weed, I can smell it, I'm getting dizzy," Djokovic told the umpire after winning the first set.

He later told reporters the smell was worse than people might have thought.

"You can't believe how bad it was," he said. "Whoever it is, I hope he doesn't come back tomorrow. He's probably on the seventh sky somewhere."

It isn't the first time that Djokovic has been affected by marijuana smoke. The Serbian made a point during his doubles match with partner Janko Tipsarevic on Friday that someone in the Montreal crowd was having a little too much fun in the stands.

"Yesterday in the doubles match, today again ... somebody's really enjoying his life around the tennis court," Djokovic said.

It is unclear whether or not there was more of the same marijuana smoke in Sunday's final, but either way Andy Murray snapped an eight-match losing streak against Djokovic, beating him 6-4, 4-6, 6-3.