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Novak Djokovic was forced to complain to the umpire during his Rogers Cup victory against Jeremy Chardy after claiming the smell of cannabis on court was making him feel unwell.

After winning the first set in Canada, the World No 1 approached the chair to speak about the pungent smell filling the air.

The Serbian ace said: 'Someone is smoking weed, I can smell it, and I'm getting dizzy. Somebody is getting high. Can you smell it? The whole place smells of it.

'He also told reporters after his victory: 'I can't believe how bad it was.

'Whoever it is, I hope he doesn't come back tomorrow. He's probably on the seventh sky somewhere. First in the doubles match, today again. Somebody's really enjoying his life around the tennis court.'