Heavyweight boxing took another step towards a championship fight that fans across the sport want to see.

Anthony Joshua moved to 31-0 on Saturday night and added the WBO heavyweight to the WBA (super), IBF, and IBO belts that he already owns when he defeated Joshua Parker by unanimous decision. It was the first time Joshua had to go the distance in a fight and it surprised a lot of people watching the match.

That includes Tuscaloosa's heavyweight champ Deontay Wilder. He's the man that owns the other heavyweight belt (WBC) and arguably the most prestigious. Here's what he posted on Twitter after watching the Joshua-Parker fight.

A fight between Joshua and Parker appears to be pretty close as they both remain undefeated and are the two title-holders in the heavyweight division. Joshua said he was ready to take on America's champ as long as they fought in the UK, and Wilder's team responded by saying let's go.

We'll have to wait and see if the two parties can come to an agreement that would make the fight happen this year. If not, there might be another title defense for both men before the belts can be unified.