Roman “Chocolatito” Gonzalez is rising in weight to challenge junior bantamweight titleholder Carlos Cuadras on Sept. 10 in a bout that will headline a card at The Forum in Los Angeles on HBO (10 p.m. ET), it was announced on Wednesday.

Gonzalez-Cuadras will serve as a split-site doubleheader with Gennady Golovkin’s middleweight championship fight with Kell Brook from 02 Arena in London. Golovkin-Brook will air live on HBO during the late afternoon of Sept. 10 while Gonzalez-Cuadras will be shown at night together with Golovkin-Brook in a tape-delay.

“We’re very excited to bring Roman back to the Fabulous Forum in his first main event at the famed venue,” promoter Tom Loeffler said in a press release. “Roman has proven with each fight why he is considered to be the #1 pound-for-pound fighter in the world.”

Gonzalez, THE RING’s pound-for-pound king, is climbing in weight from 112 to 115 pounds to take on the WBC titleholder Cuadras (35-0-1, 27 knockouts), who is rated No. 2 jr. bantamweight. If Gonzalez (45-0-0, 38 KOs) emerges victorious, it would be the fourth division in which he has won a belt.

“I’m very happy to challenge Carlos Cuadras for a world title in my fourth weight class,” Gonzalez said in a press release. “It’s an honor to return to fight at the Forum in front of the great Los Angeles fight fans. Thanks very much to God, K2 Promotions, Mr. Honda (of Teiken Promotions) and HBO for making this happen.”

Cuadras won his title in 2014 and has defended it six times, most recently against Richie Mepranum in April. RingTV.com reported last month that Gonzalez and Cuadras were closing in on a deal to meet on Sept. 10 in Los Angeles. “Roman Gonzalez is a great champion and I have a lot of respect for him,” Cuadras said in the release. “I will prepare myself to be in the best condition of my boxing career to defend my WBC belt.”