Sebastian Fundora and Errol Spence Jr. have agreed to a deal for a WBC junior middleweight title fight in October in Dallas, sources told ESPN.

PBC's hope is to stage the Prime Video PPV event at AT&T Stadium if the finalized date fits into the Dallas Cowboys' home schedule. Spence, 34, has competed there twice, with wins over Mikey Garcia and Yordenis Ugas.

Following Fundora's upset of Tim Tszyu in March's bloody slugfest to win the title, Spence stepped into the ring and called him out, saying, "It's time to get it on. He got a pretty good height, but we'll see. We'll break him down like we always do."

Indeed, Fundora possesses uncanny height for a 154-pounder at 6-foot-5 with an 80-inch reach. The 26-year-old's first title victory came on the heels of his lone defeat, a seventh-round KO loss to Brian Mendoza in one of 2023's most surprising results.

One year later, Fundora (21-1-1, 14 KOs) is ESPN's top junior middleweight after he replaced the injured Keith Thurman on 11 days' notice to outlast Tszyu.

Known as "The Towering Inferno," Fundora and his sister Gabriela are the first brother and sister to be full-fledged champions in boxing history.

Spence, meanwhile, will make his 154-pound debut after July's ninth-round TKO loss to Terence Crawford for the undisputed welterweight championship. Spence (28-1, 22 KOs) was a mainstay of ESPN's pound-for-pound list before the setback.

He recently parted ways with Derrick James, who trained him since his amateur days that culminated in a run at the 2012 Olympics. Spence and James have sued each other surrounding a disagreement over money.