Ruiz claimed a surprise seventh-round TKO win over Joshua at Madison Square Garden earlier this month, for arguably the shock result of the year thus far.
A late replacement for Jarrell Miller, Ruiz wasn't expected to pose any threat to the undefeated Brit in what was his American debut. But against all odds, the Mexican sent Joshua to the canvas for an iconic result in New York to claim the WBA, IBF, and WBO heavyweight titles.
Joshua triggers Ruiz rematch
Dawejko, 29, was not surprised by the result, having sparred with both men.
‘"I always knew Andy Ruiz had skills, I was in the gym with him, I’ve sparred with him, I’ve seen it, I knew, I understood," Dawejko told FightHype.
"It wasn’t too big of a shock to me. You can go back and see any interview before the fight, I was always saying Ruiz would give him some trouble starting out, just because of his style.
"And when I was in camp with Joshua I told him that."