Tennis can be considered somewhat of a conservative sport. Fans (understandably) are told to be quiet before every single point and certain tournaments (like Wimbledon) have strict regulations about wardrobes for the players. So, what's definitely unacceptable for fans to be doing at a tennis match? Smoking up.
In the liberal city of Montreal, Novak Djokovic claimed during his semi-finals match that “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,” according to The Telegraph. The Djoker still won the match, but lost to Andy Murray in the Finals. We'll assume that he didn't cope with the loss by taking a few tokes.