Yordenis Ugas clearly was more than healthy enough to beat Manny Pacquiao on August 21. (photo by Ryan Haney)

The WBA “super” welterweight champion confirmed to BoxingScene.com, though, that the arm injury that caused such an uproar the day before they fought required surgery after Ugas upset the Filipino legend by unanimous decision in their 12-round, 147-pound title fight. Ugas’ torn left biceps, which occurred before their bout began, was repaired during that post-fight procedure.

The 35-year-old Ugas needed a few months off to recuperate, but he has been completely healthy while preparing at trainer Ismael Salas’ gym in Las Vegas for his upcoming showdown with Errol Spence Jr. on April 16 at AT&T Stadium in Arlington, Texas.

“The injury was something that had been bothering me for about three weeks [before the Pacquiao fight],” Ugas told BoxingScene.com. “But look, I was a hundred-percent recovered for the fight. It was not an impediment, nothing that prevented me from fighting the way I wanted to fight. Having said that, after the fight I also did have surgery. Now it’s totally healed and I’m not worried about it.”

Fans and reporters pointed out a protrusion from Ugas’ left arm the day he stepped on the Nevada State Athletic Commission’s scale to weigh in to battle Pacquiao in a FOX Sports Pay-Per-View main event at T-Mobile Arena in Las Vegas. Any concerns regarding Ugas’ ability to compete with what appeared to be an arm injury were quelled early in a bout that the Cuban-born boxer won on all three scorecards (116-112, 116-112, 115-113).

Miami’s Ugas replaced Spence as Pacquiao’s opponent on just 11 days’ notice.

Spence pulled out of his highest-profile fight because he needed surgery to repair a torn left retina he suffered while preparing to fight Pacquiao (62-8-2, 39 KOs). An aged Pacquiao, who is now 43, retired following his loss to Ugas to focus on his presidential campaign in the Philippines.

Spence (27-0, 21 KOs), of DeSoto, Texas, and Ugas (27-4, 12 KOs) will fight for Spence’s IBF and WBC welterweight titles and Ugas’ WBA belt in a Showtime Pay-Per-View main event at the home stadium of the Dallas Cowboys. Caesars Sportsbook has installed Spence as more than a 4-1 favorite versus Ugas.

Keith Idec is a senior writer/columnist for BoxingScene.com. He can be reached on Twitter @Idecboxing.