There has been a slight change to the undercard of Saturday’s show in Atlantic City, New Jersey, headlined by the unification bout between welterweight titleholders Jaron “Boots” Ennis and Eimantas Stanionis.

Initially, junior featherweight prospect Arturo Cardenas – also known as Arturo Popoca – was supposed to face Christian Carto, 23-1 (16 KOs), on the main DAZN broadcast.

“Unfortunately, Christian Carto was unable to fight on Saturday due to a medical issue,” the show’s promoter, Eddie Hearn of Matchroom Boxing, said during a press conference on Thursday.

Instead, Cardenas, 15-0-1 (8 KOs), will face a local late replacement, Edgar Joe Cortes, 9-7-1 (1 KO), on the preliminary undercard.

Cardenas is a 24-year-old from Mexico fighting for the first time in 2025. Last year he won a trio of bouts on the scorecards: a unanimous decision over the 11-3 Ernesto Garcia Flores, a majority decision over the 15-0 Danny Barrios Flores and a split decision over the 21-1 Jesus Arechiga Valdez.

Cortes is a 30-year-old from Millville, New Jersey, who last fought in November 2022, when he suffered a fourth-round technical knockout against the 7-0 Floyd Diaz.

“We were ready for our opponent, Carto, but that fight didn’t materialize because of a few details,” Cardenas said, according to a translator at the press conference. “But regardless, we are ready for whatever opponent comes our way and we hope that the folks of New Jersey enjoy the fights on Saturday and the way that I box. We’ll be back again soon.”

Hearn said Cardenas is expected to fight underneath junior bantamweight titleholder Jesse “Bam” Rodriguez this summer.

The main DAZN broadcast will now feature four fights, beginning with welterweight contender Shakhram Giyasov against Franco Maximiliano Ocampo, followed by junior middleweight prospect Omari Jones taking on William Jackson, then a clash between junior lightweights Raymond Ford and Thomas Mattice in the co-feature, capped by Ennis-Stanionis in the main event.

The preliminary undercard is scheduled to begin at 5 p.m. ET (10 p.m. BST). The main broadcast is scheduled to begin at 8 p.m. ET (1 a.m. BST).

David Greisman, who has covered boxing since 2004, is on Twitter @FightingWords2. David’s book, “Fighting Words: The Heart and Heartbreak of Boxing,” is available on Amazon.