Nick Diaz vs. Carlos Condit isn’t the only good fight on the UFC 143 card this weekend.

Fabricio Werdum is returning to the UFC after a stint in Strikeforce where he became the first fighter to legitimately defeat Fedor Emelianenko. He’s taking on Roy Nelson in what will hopefully be a good scrap.

In a recent interview with Brazilian media outlet Globo, Werdum warned that Nelson needs to keep his hands up or he might get knocked out. Translation via BE:

I can tell you that he’ll need to keep his hands up, because a knockout might happen. He’ll need to keep his hands way up, in high guard. I think I’ll hit his legs a lot. Roy Nelson is very tough and can endure a lot of beating, he showed that against [Junior dos Santos], but there’s always a weak spot. I’ll try to look for that flaw during the fight. I think I will win with agility and mobility. I am well mentally, as well as physically, much faster and this will be determinant in this fight, due to the fact that he’s slower, a fatty.

It will be a very strategic fight. It’s my return to the UFC, it will be very important to me. When I have the opportunity to KO or submit, I will do it. I don’t like to win by points, it happens sometimes, but my prevision is this: knockout or submission. The main thing is the victory. My mom always tells me that the important thing is to raise the arm in the end (laughs).

This is a tough one to predict. Werdum did tag Alistair Overeem a few times when they fought, so it stands to reason that he could hang with Roy on the feet, although I think the slight edge has to go Nelson there. On the ground, you have to give the edge to Werdum. Nelson is well-versed in BJJ as well, but Werdum is a former ADCC champion. In other words, definitely don’t expect to see Nelson put Werdum in one of his crucifixes.

I do think the fight will end in a decision, but who comes out the victor is anyone’s guess. Any predictions?

Image via Esther Lin for Strikeforce/Showtime