Anthony Joshua is training hard for his upcoming defense of the IBF, IBO, WBA, WBO heavyweight world titles against undefeated unified champion Jarrell Miller.

The bout takes place on June 1 at Madison Square Garden in New York City.

Should Joshua comes away with the win - there are several possible options on the table.

Two of those options will see action next month.

WBC champion Deontay Wilder will defend against mandatory challenger Dominic Breazeale on May 15 at Barclays Center in Brooklyn, and Oleksandr Usyk will make his heavyweight debut against Carlos Takam on May 25.

Usyk, the unified cruiserweight champion, will become the WBO's mandatory challenger to Joshua.

While Eddie Hearn, who promotes Joshua and Usyk, sees their showdown as the most likely fall option, Joshua would prefer to face Wilder first and then make a defense against Usyk later on.

"It's really good because we've got me and Miller, Wilder vs Breazeale, [Tyson] Fury vs [Tom] Schwarz, Dillian Whyte is going to do something, Usyk vs Takam. The heavyweight division is alive. It is booming," Joshua told Sky Sport.

"I think it will be class if I can fight Wilder for the undisputed title and then I could fight Usyk because then that would be the undisputed heavyweight champion versus the undisputed cruiserweight champion at heavyweight. That would be unbelievable."

Joshua holds a stoppage win over Breazeale, which is still the former Olympian's only defeat. While some expect Wilder to win easy, Joshua could see the challenger creating some issues for Wilder.

"I think Breazeale could cause Wilder some problems. It will be interesting to see him if Wilder can match him in boxing skill," Joshua said.

"They're both decent boxers. Breazeale is an Olympian but Wilder is just very quick, so if he catches Breazeale early it might be lights out as we have seen his last 40-odd fights."