Tennis seems much sketchier than I remember.

During the Paris Masters, while Novak Djokovic was facing off against Stefanos Tsitsipas, a fan captured footage of Djokovic's trainer in the player's box engaging in some very suspicious behavior.

We can see Djokovic's trainer removes something from his backpack, before mixing it into a drink. Once they notice they are being filmed one of the men tries hiding their activities from the camera. After finishing the concoction, one of the men hands the bottle to the ball girl to give to Novak.

Cheating? PEDs? You be the judge.