Wladimir Klitschko says Tyson Fury is jerking his team around when it comes to their rematch -- and now he's forced to go to court to get the heavyweight champ to honor their contract.
The two were originally supposed to fight in July -- but it was postponed when Fury got hurt. Now, they're expected to go at it in October ... but Klitschko says Fury is screwing things up.
"Unfortunately, Team Fury is trying to change the terms of already signed contract multiple times and is going on endless," Klitschko said.
"To protect my own rights, and eventually see the rematch, I'm forced to go to court."
No word on exactly what Fury is trying to change -- but clearly, Wlad is pissed.
He better hurry up and resolve this thing ... Wlad is 40 and he ain't gettin' any younger.