Lawrence Okolie has arrived on the heavyweight stage.

The former WBO cruiserweight and WBC bridgerweight titlist needed less than one full round to dispose of Hussein Muhamed. A right hand floored Muhamed, after which referee Lee Every waved off the contest at 2:14 of the first round Saturday at OVO Arena Wembley in London.

Okolie (21-1, 16 knockouts) fought for the second straight time above the cruiserweight limit, while the night marked his Queensberry Promotions debut. His previous bout came with the WBC bridgerweight title at stake. He dethroned Lukasz Rozanski via first round knockout but vacated the belt in exchange for a favorable top five slot in the WBC heavyweight rankings.

Saturday’s performance was right on time to further push him towards a third divisional title run.

Okolie didn’t need long to establish his dominance. A sneak right hand caught Germany’s Muhamed (18-2, 14 KOs) on the chin midway through the opening round. Muhamed withstood the blow but quickly found himself on the defensive.

It was a bad place to be versus the heavy-handed Okolie, who closed the show in style. A right hand clean across the chin sent Muhamed crashing to the deck for the bout’s lone knockdown. Muhamed rose to his feet but could not steady his legs, which forced an immediate stoppage.

“Now that I’m putting on the weight, I’ve been enjoying training camp more,” Okolie said after the win. “The truth is I’ve been world champjon in two weight classes. Now I’m ready to do it in a third.”

Okolie’s lone defeat came last May 27, when Chris Billam-Smith (20-2, 13 KOs) ended his WBO cruiserweight title reign. The 6’5” Hackney, London native—who represented Great Britain in the 2016 Rio Olympics at the amateur heavyweight level—held the belt for more than two years prior to that point. He then decided it was no longer worth it to shrink down to the 200-pound limit.

Friday’s official weigh-in saw Okolie arrive at a filled-out 260.8 pounds. There is certainly room to trim down but it beats the alternative as far as he is concerned.

“I feel happier now, it’s more natural and solid,” Okolie of his heavier weight. “I felt like when I was at cruiserweight, I wasn’t at full strength.”

Okolie-Muhamed was part of Queensberry’s latest installment of its ‘Magnfiicent 7’ series, which aired live on TNT Sports in the UK and DAZN in the U.S. Headlining the show, Brad Pauls (19-1-1, 11 KOs) and Denzel Bentley (20-3-1, 17 KOs) meet in a twelve-round middleweight contest.

Another heavyweight bout on the undercard also ended in the first round.

It was also the evening’s biggest surprise, as David Adeleye (13-1, 12 KOs) dealt the first career defeat to former amateur standout Solomon Dacres (9-1, 3KOs). A sweeping left hook caught Dacres on the right temple, which put him on the canvas and forced the bitter end at 1:20 of the opening round.

Adeleye fought for the first time since a one-sided, seventh-round knockout defeat to Fabio Wardley (18-0-1, 17 KOs), now The Ring’s No. 9-rated heavyweight, last Oct. 28 in Riyadh, Saudi Arabia.

George Crotty (1-0, 0 KOs) enjoyed a successful debut, as he won every round (40-36) in a four-round victory over Dylan Courtney (2-18-2, 1 KO).

Aloys Youmbi (9-1, 8 KOs) stopped Lewis Oakford (6-2, 0 KOs) in the third round of their cruiserweight contest. Youmbi froze Oakford in place with a pair of right hands upstairs to force the stoppage at 1:39 of round three.

Sean Noakes (9-0, 4 KOs) outpointed Mathew Rennie (14-1-1, 1 KO) over ten rounds in their battle of unbeaten British welterweights. Scores were 97-93 on all three cards for Noakes, whose younger brother Sam Noakes (15-0, 14 KOs) faces Ryan Walsh (29-4-2, 13 KOs) in the evening’s co-feature.

Royston Barney-Smith (13-0, 7 KOs) opened the main telecast with a fifth-round stoppage of Colombia’s Andres Navarrete (12-3, 3 KOs). Barney-Smith floored Navarrete in the third and twice in the fifth. The last of the trio was a body shot to produce the full ten count at 2:57 of the fifth round in their featherweight affair.