Thinking also the same if the odds are great. Since Ugas is the sure underdog, I'm expecting at least an odds between @3-4 regardless of what he has shown during the fight with Manny Pacquiao. Ugas surely learn some lessons after a fight with a high-class boxer after defeating it. Ugas will treat Spence as another achievement if he passed on it that's why he will be seen to be expected more aggressive here compare to the latter.
There are no betting odds out for this game right but I do also think that if betting odds were out it would be a close gap between the two fighters, however, I am not thinking that Yordenis Ugas will be the underdog on this fight since he has recently won on their fight against Manny Pacquiao. But the undefeated record of Errol Spence is quite attractive to be treated as underdog too. Did these speculated fights have already a scheduled date?