Robert Guerrero isn’t just a participant on this weekend’s Pay-Per-View show in Las Vegas but also among the most interested observers of the evening’s headlining act.

The former multi-division titlist attempts to extend his current three-fight win streak as he faces former welterweight title claimant Victor Ortiz this Saturday at T-Mobile Arena in Las Vegas. The scheduled ten-round welterweight contest comes in supporting capacity to a far more significant divisional bout, with WBA titlist Yordenis Ugas (26-4, 12KOs) facing former eight-division champ and all-time great Manny Pacquiao (62-7-2, 39KOs) atop the Fox Sports PPV.

“It’s going to show what kind of fighter Ugas is,” Guerrero told “He has to go from making that adjustment sparring left-handed fighters within ten days. It will really show what kind of fighter he is.

“Pacquiao, he’s done it all and has faced right-handed fighters his whole career. Those adjustments for Pacquiao will be a little easier, especially with Ugas getting ready for Fabian Maidana. It’s going to be a good fight but it’s going to show where Ugas is at, as a world class type of fighter.”

Pacquiao-Ugas was made just eleven days out from the opening bell, after both boxers lost their opponents to injury.

Pacquiao was due to challenge WBC/IBF welterweight titlist Errol Spence, a southpaw who was forced to withdraw after a pre-fight physical showed evidence of a torn retina. Ugas was training to face orthodox boxer Fabian Maidana, who suffered a cut over his eye in training early last week and had to pull out of the fight.

With the change, Pacquiao’s weeks-long camp preparing for a southpaw now changes to preparing for the right handed Ugas. Similarly, Ugas is now tasked not only with facing a left handed boxer on short notice, but one of the greatest southpaws of all time in Pacquiao.

Comparing their accomplishments in the sport, the sense is that the burden of proof is now on Ugas—even in facing a 42-year-old Pacquiao who hasn’t fought since a July 2019 win over then-unbeaten Keith Thurman.

“I think Pacquiao is going to do great,” insists Guerrero. “It comes down to seeing how Ugas makes the adjustments to facing a (southpaw).

“It’s tricky when you get a power puncher and a speedster like Pacquiao. We’ll see how he does.”

Jake Donovan is a senior writer for Twitter: @JakeNDaBox