Terence Crawford, Errol Spence Say Win Makes Them Best Boxer In The World

Errol Spence and Terence Crawford have a lot more than their undefeated records and four shiny belts on the line in Vegas Saturday night … both superstars agree, the winner is the best boxer of this generation!

TMZ Sports is on the ground in Sin City … and we talked to both fighters just days before the biggest clash of their professional lives.

“I can’t wait to show everybody why I am not the best 147-pounder in the world, but the best fighter, period,” 33-year-old Spence said.

If you’re a boxing fan you can hardly wait. It’s the scrap you’ve wanted for years, but believed would never actually happen — two undefeated greats, champions — battling in front of the world … 28-0 (22 KO) Spence vs. 39-0 (30 KO) Crawford.

But, it is going down … and it’s only a day away.

“It took a while for me and Terence to happen, but it’s happening at a great moment right now,” Spence told us.

“We’re fighting for all the marbles. He’s undefeated, I’m undefeated. I think it’s gonna be a great fight, a great showing, and we’re definitely gonna give the people their money’s worth on Showtime Pay-Per-View.”

Crawford also believes the winner will rightfully lay claim to being called the best active boxer alive.

“I wouldn’t say the greatest fighter of all-time, I would just say the greatest fighter of this era,” Bud told us.

As for the motivation to take such a risky fight … both men acknowledge they’re going home with a big ol’ check, but it’s not all about the money. Not even close.

“I’m more motivated about beating him because it’s a huge rivalry between us. Everybody always attaches our two names together for probably about 6 or 7 years now,” Errol told us.

“It’s more of a competition factor more than anything. I want to defeat him. I find gratification in defeating him more than anything else.”

Despite being at the center of the storm, the magnitude of the fight isn’t lost on Terence, either.

“I definitely believe [it’s the biggest fight in a long time]. This is the fight that everybody been wanting. You have the two of the greatest fighters of this era going head to head with each other, and it’s gonna be a great night of boxing Saturday night.”

As if the main event wasn’t enough, the card also features several other kickass fights, including the great Nonito Donaire — a future Hall of Famer — taking on Mexican contender Alexandro Santiago for the WBC Bantamweight World Championship. Isaac Cruz is also fighting undefeated Giovanni Cabrera.