MIAMI — There’s a new No. 1 middleweight contender.

Sergiy Derevyanchenko stunned Tureano Johnson with a knockout 40 seconds into the 12th round of a nationally televised fight Friday, Aug. 25, that originated from downtown Miami in front of the Coleman Theatre.

“I am very happy … very happy,” Derevyanchenko said. “This was a consequential step.”

Derevyanchenko (11-0 with nine knockouts), who went into the fight as the second-ranked contender behind Johnson, now gets a title shot against either current WBC/WBA/IBF/IBO champion Genady Golovkin, who defends his title against Ring Magazine champ Canelo Alvarez on Sept. 18 in Las Vegas.

Derevyanchenko, ranked top five in the WBC and top 10 by most of boxing’s other governing bodies, used brutal combination of punches to the head, finally dropping Johnson.

Referee Gary Ritter jumped in and stopped the action, which was the main event in a Premier Boxing Champions series on FS1.

“It was far from an easy fight,” Derevyanchenko said. “In the early rounds, I saw that after a couple punches I landed, he would be a little bit hurt, but not that hurt.”

This was Derevyanchenko’s first 12-round fight.

He had gone the distance just three other times in his 11-fight career: twice in four-rounders and once in an eight-round fight.

He was scheduled to go 12 against Sam Soliman in July 2016, but got a TKO in the second round.

“He will be even stronger because now he knows what he has to do,” said trainer Gary Stark Sr. “He finished strong.”

"I'm very disappointed," Johnson said in a DiBella Entertainment release. "But I give a lot of credit to Derevyanchenko and congratulate him on his performance tonight."

In other televised fights, middleweight Hugo Centeno Jr. (26-1, 14 KOs) pinned the first loss on Immanuwel Aleem (17-1-1) out at 2:27 of the third round and Austin Dulay of Nashville, Tennessee, improved to 11-0 with a TKO win when Carlos Padilla of Barranquilla, Columbia, retired at the end of the third round.

Padilla has now lost his last two fights, including a unanimous decision to Billel Dib on Dec. 10, 2016 at Buffalo Run.