Wilder ran his record to 40-0 with 39 knockouts, but it was not easy. He was on the defensive in the first three rounds of their bout perhaps wary of his opponents power.
In the 10th, he threw a combination of punches to knock Ortiz down. Wilder vs. Ortiz, the main event, will follow two other televised bouts. Wilder boxed effectively to slow down Ortizs advances and regained his composure as the round ended.
Both men had their moments in round 9 but Wilder seemed to get the better of it when he momentarily stunner Ortiz with a straight right. The challenger stalked him but was unable to pin him down for another set of attack.
Wilder had to survive a beating from Ortiz before landing a brutal punch in the 10th round which knocked out the Cuban boxer. The bell saved the champion from his first knockdown in his career.
'His promoter does not want that fight and after seeing what happened to Ortiz they are definitely not going to want it. He put up a great fight.
Deontay Wilder can just turn it on when he wants.
"This was a signature win against a Luis Ortiz who everyone in the division has ducked".
He is a KO machine and, although I think he is a bit raw, his knockout punch to finish Artur Szpilka in January 2016 was a very clever, well-timed, explosive shot.
Deontay Wilder has successfully defended his WBC World Heavyweight title after overcoming the challenge of Luis Ortiz via a tenth-round stoppage - however, it was far from plain sailing for "The Bronze Bomber". He credited the champion for weathering the storm and hoped for a rematch in the future. A defensively-proficient southpaw with a left hand that flies down the pipe, nobody fights him unless they really have to.
"A true champion always finds a way to come back and that's what I did tonight", said Wilder in his post-fight interview.
Or maybe not, Anthony Joshua also had the same unassuming route to becoming a world champion when he beat "Prince Charles", who wasn't worthy of that regal title at all, perhaps the lesser "Duke" or "Count" might have been more befitting to his ability, but still not deserving. The WBC kept Ortiz in its rankings because the sanctioning organization concluded following an investigation that Ortiz's positive test stemmed from required blood pressure medication he failed to disclose he was taking on VADA's pre-test form.
"I feel fine; I did receive a right hand, but I'm OK", Ortiz said. Im ready whenever those guys are.
The American made a successful defence of his WBC world title by stopping the unsafe Cuban in the 10th round, improving his professional record to 40-0 in the process which includes 39 brutal finishes. "This solidified my position at the top of the food chain", Wilder said. Klitschko had reigned for nearly a decade but Wilder says Joshua faced the Ukrainian when he was past his best.