Andy Ruiz Jr. is one of only two heavyweights who knows what it takes to beat Anthony Joshua.

The Mexican-American famously accomplished this feat in June 2019 at Madison Square Garden.

Despite being a late stand-in and a huge betting underdog who was knocked down early, ‘The Destroyer’ rallied and had ‘AJ’ down several times en route to a sensational stoppage victory.

This win made Ruiz a unified champion, but his reign was short-lived. He admits that he spent more time indulging in food and nightlife than training in the six months following his victory. Consequently, he came into the rematch underprepared and lost a conclusive 12-round points decision in Saudi Arabia.

Joshua later lost his titles to Oleksandr Usyk in 2021 and failed to regain them in a rematch in 2022. Now, he is looking to become a three-time world champion when he takes on IBF ruler Daniel Dubois at Wembley next month.

Ahead of that fight, Ruiz was asked by Seconds Out what Dubois must do to upset the odds as he once did.

“He just has to believe in himself, believe that he’s going to win. Be smart in there. Try not to get hit with these big shots because [AJ] is strong, he is big, but anything is possible, man. Just exactly like how I won, anybody else can win. All they have to do is believe in themselves and work hard and be smart. He’s on a two-win streak. Anything can happen, you never know.”

Ruiz stopped short of predicting a winner when asked.

“I don’t know. I don’t want to say. I hope they both win. I know Dubois, and I know his dad. They’re good people and I wish the best for them.”

Ruiz has his hands full this weekend as he takes on Jarrell Miller on the undercard of the Terence Crawford versus Israel Madrimov world title fight.