Undefeated Oscar Rivas holds a victory, in the amateur ranks, over current IBF, IBO, WBA, WBO heavyweight champion Andy Ruiz.

Rivas will return on July 20th in the biggest fight of his career, when he faces Dillian Whyte at the O2 Arena in London. The fight will be featured on Sky Sports Box Office and DAZN.

Rivas beat Ruiz 16:4 to progress to the 2008 Olympic Games in Beijing. Rivas beat Kubrat Pulev at the Olympics but lost to the eventual champion, Roberto Cammarelle of Italy.

Rivas reflects that fight Ruiz was no easy task, even in the amateurs.

"I really had a tough fight against him. It's a fight I won thanks to my speed and my experience as an amateur, but also you could say that fighting him was my ticket to the Olympics, and a chance to fight the best heavy weights in the world," Rivas said to Sky Sports.

"It was not an easy fight because Ruiz is taller than me. He has really fast hands. He is difficult to box. But I am really proud to have beaten him fair and square. I'm most proud because I fought southpaw. I saw that Ruiz was knocking everybody out so, as a strategy, I decided to go southpaw for this fight. You need to keep your distance because he throws lots of punches. You need to move a lot, do not stand as a static target in front of him."

Ruiz is the new kid of the block, when it comes to the elite level of the division, after he shocked the world last month by stopping Anthony Joshua in seven rounds. He dropped Joshua four times.

"Joshua was a bit overconfident during his fight with Ruiz. You could say that Andy did a good job while everyone thought that he wasn't capable of winning against Joshua but in the end, it was there for everyone to see," Rivas said.

"Eleven years after our amateur fight, I'd like to face Andy Ruiz in a professional ring. A professional fight changes everything because an amateur fight is just three rounds, while a professional one is 12 rounds. You can never tell what's going to happen when you get into the ring with someone. It's best just to get in the ring and give it your best shot."