It’s true. Wanderlei Silva has yet to sign his contract to fight Chael Sonnen.

The two middleweight fighters have taped the entire season of TUF Brazil 3, and are expected to square off in Brazil later this year.

An unexpected hiccup in those plans has come up as of late, and it comes in the form of Silva’s refusal to sign his bout agreement.

Because of that, Sonnen has taken to twitter to issue a deadline.

Here it is:

@_MMAFNL I swear to you, if he doesn't sign within the next 10 days, I will drop the biggest bombshell in the history of MMA. #blackmail

— chael sonnen (@sonnench) March 21, 2014