I can't bet against Tai, and him being the underdog is always quite enticing with his recent rise to fame. The man is a star, even if his career will be somewhat short lived. The way he fights, basically makes his fights a coin toss, and I think Gane would know how to not get hit by him, since most of Tai's knockouts come from fighters just sitting in the pocket, and banging. Lewis found that out.
Gane will just look to touch him up, and then use his feet to get out of the way, and re-establish that distance. Tai will have to really work hard. I actually think that's how it's going to play out, and will probably be a rather boring fight. The value bet for me is it going the distance.
Remember tho that the match between them is a 5 rounder. I think Gane is gonna finish around the third or the fourth or something. Tuivasa is susceptible of getting finished in the past as his record shows. I'm not sure where the books have lined the over/under but if it's 2.5 and over is at plus money, I'd say over.
Anyway, I'm not really sure why the UFC decided to make Gane and Tuivasa the main event. Whitaker bs Vettori seems like it's a higher level match and the winner of the match could get a shot at the belt again.