Andy Ruiz on Anthony Joshua Rematch, I’ve Got Some Demands!

Heavyweight boxing champ Andy Ruiz says he’s already training for the rematch with Anthony Joshua … and tells TMZ Sports he’s calling the shots this time around!!

Of course, Ruiz was a late replacement who stepped in for Jarrell Miller when “Big Baby” failed a drug test — with Andy only getting around 6 weeks of training before the June 1 fight. 

But this time around, Ruiz tells us he’s working in a FULL training camp — and he’s going to be the one to decide WHERE the fight takes place. 

Ruiz tells us he’d like to throw down in Mexico — where he recently met with President Lopez — or go back to Madison Square Garden in NY. 

There’s one place he won’t go … England, where Joshua is from. 

Bottom line … “I’m the champion,” Ruiz says — “We’re the A-Side.”

As for whether he’s spoken with Joshua, Ruiz tells us, “I haven’t talked to him, but I’m pretty sure he’s training hard for the rematch. And, so am I.”