OPTION 2

The first sabotage plan that came to mind was the classic mass food poisoning, but then I realized that there might be a special rule that the game would be postponed If the whole team is sick. So that would make it not optimal. Otherwise just slipping some laxative etc. in their drinking bottles would have done the trick. But along the same lines there would be another way. It would have to be something that the players would be ashamed to even say out loud, but that would still hinder their performance. "I feel like I'm drunk" could seem pretty difficult to say out loud, and some players could even be afraid that they have to go into some kind of protocol, or might get fined or something even worse. So the key would be to get everyone drunk. I would bribe someone from their equipment team or the arena staff, and make them make a perfect Gatorade mixture, that would have just enough alcohol to have an effect but no taste.