As a champion, they want a big fight and now, it is a blessing in disguise for him because they did not expect the blessing will come out early. He is not an undefeated fighter, no record to protect, but to fight with the one and only 8th-time world champion, that's a privilege and it's a big success if he wins.
I agree, this match is more of an opportunity for Ugas. If he managed to beat Pacquiao then that he'll set the record and as well as going to increase his rank because he has defeated Pacquiao who is very popular and one of the best boxers in the world. It is truly a blessing in disguise for him and we just wish both of them to fight at their full capacity despite the changes that have happened with those changes that have given them a little timeframe of preparation, honestly, they've been prepared for so long just for their own matches.
If you happen to watch the reaction of Ugas team after learning that he will fight with Pacquiao, they were celebrating like they are about to go to the party.
Indeed, this will be a big break for Ugas, if in case he will win over Pacquiao. But am rooting for Pacquaio here. Given the age that they are considering about the major factor that may influence his perfomance, but it also depends on how well he trained for the fight. And I think, he really did train hard because he thought he will be facing Spence Jr.