The MMA and boxing worlds are divided by the upcoming fight between Jake Paul and Tyron Woodley.
YouTube star Paul has handily won his first three fights by knockout, but for the first time in his professional career he takes on a really serious challenge in former UFC champion Tyron Woodley.
The ex-MMA champion came from a decorated NCAA Division 1 wrestling background, but he became a feared striker with serious knockout power during his fighting career.
But he is stepping into a whole new game tonight when he takes on the social media sensation in his first ever boxing match at the age of 39.
His fight CV is considerably more impressive than Paul's, defending the coveted UFC welterweight belt four times against the likes of Stephen Thompson and Darren Till.
But he lost his last four on the bounce before being cut by the promotion, being taken down by Kamaru Usman, Gibert Burns, Colby Covington and Vicente Luque over the last few years.
We asked some top fighters and internet personalities for their picks ahead of tonight's fight:
Michael Bisping
"I want to prefix this by saying 'I don't know', it's such an unknown quantity," Bisping told Mirror Fighting earlier this week.
"Tyron Woodley might go out there and absolutely embarrass him, but there's a possiblity that the complete opposite happens.
"There's a possibility that Tyron takes his time too much and let's the fight get away from him and gets caught.
"Based on the fact that I know Tyron and I have a relationship with him, I wish him success so I'm going to pick him.
"But that is just me picking with my heart."
Pick: Tyron Woodley
Michael 'Venom' Page
"I've got to go with Tyron Woodley, purely based on his experience, his understanding of fighting and his power.
"That power is very different when you come up against somebody with that one-shot ability.
"Even in Jake Paul's fight against Ben Askren who is a shocking striker he still managed to land a punch on Jake.
"You do not want that to happen against Tyron Woodley and I don't know if he's as slick to prevent that from happening in the early rounds.
"If he is, it's the later rounds that Woodley will be more worried about."
Pick: Tyron Woodley
Darren Stewart
"I don't know who's going to win that one, I'm sad to say.
"But if Jake Paul wins? I'm quitting, I'm going off to be a YouTuber."
Pick: Undecided
Gegard Mousasi
"Who thinks that Tyron Woodley is going to win? It's obvious he's going to get knocked out. Woodley is not a boxer and he's a small guy.
"They didn't bring him to win. I don't see him winning. Listen, Tyron Woodley is a wrestler. He has one good right hand. I haven't seen him do boxing combinations in any of his fights. I don't know where people get it that he's going to knock Jake Paul out.
"Jake Paul is a decent boxer, he's not bad. People underestimate him, he is bigger and longer. I think he's going to make it difficult for Woodley."
Pick: Jake Paul
AnEsonGib
"I've been hearing rumblings about this.
"I haven't really researched it too much but taking on a UFC champion is a big step, a way bigger step than Ben Askren.
"I want to see the YouTuber win. I know he beat me, but I always want to see the YouTuber win. I'll tell you, it's going to be a tough scrap."
Pick: Jake Paul
Deji Olatunji
"I don't think he will beat Woodley honestly.
"The fact that there's a rematch clause, which I heard was implemented by Jake, makes me feel that Jake isn't that confident, so I could see Tyron clipping him and knocking him down."
Pick: Tyron Woodley
