Errol Spence is putting all his belts on the line Saturday night when he steps in the ring with Yordenis Ugas ... but it's the guy the undefeated boxing star wants next that'll be music to fan's ears -- Terence Crawford!!
TMZ Sports spoke with the champ ahead of his unification bout against 27-4 (12 KOs) Ugas ... his first fight since he had surgery on a retinal tear in his left eye in 2021.
"I'm 100% healthy and 100% ready," Spence tells us.
"My message to anyone doubting, please tune in.