WBC heavyweight champion Tyson Fury believes Deontay Wilder has lost his mind, after the once-beaten puncher made several allegations regarding their rematch.

Back in February, Fury stopped Wilder in seven rounds to capture the WBC title at the MGM Grand in Las Vegas.

Wilder remained silent for several months.

But last weekend, Wilder finally broke his silence with a video on social media and also conducted a few interviews.

Wilder made claims that Fury had loaded his gloves for the February fight with "egg weights." He also claimed that former co-trainer, Mark Breland, was working as a double-agent and may have spiked his water. There were also statements made, that referee Kenny Bayless was intoxicated during the match.

Fury, who is no stranger to making controversial comments, has no idea what's going on in Wilder's head. 

"I think he has lost his marbles," Fury told Talk Sport. "First of all it was the suit, then it was the bicep injury, then his trainer was on our team, then the referee was against him, then I had weights in my gloves. Now someone has spiked his water. It’s one of those things, isn’t it."

After suffering the first defeat of his career, Wilder exercised an immediate rematch clause.

The fight was scheduled for July 18, but then pushed back due to the coronavirus pandemic.

As far as Fury and his handlers are concerned, the rematch clause has expired and they plan to make a voluntary defense on December 5.

"The original date was July 18," Fury said. "That didn’t happen because he had an injury so it got put back three months to October, then that didn’t happen because they were trying to get a venue.

"And then they had three dates in December – 5th, 12th, 19th – which I agreed to all them and obviously that didn’t’ happen. So, I’m not going to wait around forever."