Bellew and Cleverly will face each other later this year if they can both come through their respective encounters in little over a week's time, but the Liverpudlian is refusing to underestimate the threat of his next opponent.
The 31-year-old is quoted by Sky Sports News as saying: "It's all about July 12, not about Nathan. I can't think about anything other than Julio Santos. He's a very, very durable and hard-punching Brazilian.
"I know that he is strong, he has never been stopped and he does a little of everything. Fans come to see me because I stop people, and this guy is a solid proven cruiserweight so we'll see what I can do with him.
"I've settled into the weight perfectly and you'll see a destructive performance on July 12."
Cleverly got the better of Bellew on points in their first bout almost three years ago.