Written Option 1
I think the best way to get the other team's star player off of their game would be to just outright hurt them. I don't mean injuring them, but it's pretty easy to really piss a guy off with a couple of slashes or wacks on the back of the leg. You have to do it after the whistle when everyone gets in a scrum. It doesn't matter what language you speak, everybody knows how bad it feels when you get two hands on the wrist. The other thing to do would be to force them to fight you. Everyone knows the code, you have to throw down or you're a little bitch. Never stop going after him until the entire world thinks he's a coward or he fights you. At the very least that takes him out of the game for 5 minutes. Sure it's dirty, but my teammates told me to put everything into aggression so they knew what they were doing.