Hall of Fame boxing commentator, Bob Sheridan, believes WBO welterweight champion Jeff Horn (18-0-1, 12 KOs) has a shot to upset Terence Crawford (32-0, 23 KOs) - if and when they get in the ring with each other.

However, Sheridan admits the likelihood of that happening is a very big long shot.

Horn crashed on the scene last July, when he pulled off an upset twelve round unanimous decision over eight division world champion Manny Pacquiao to capture the WBO crown.

Top Rank's CEO Bob Arum, who promotes Crawford and has an option on Horn, is trying to make the fight for April 21 at the T-Mobile Arena in Las Vegas.

The World Boxing Organization made Crawford the mandatory challenger when the unbeaten boxer announced that he was moving up to 147-pounds. 

"I give him a chance because Horn is an extraordinary athlete, but I tell you, to move up to fight one of the best fighters in the world today, that’s a real tough road for Jeff Horn. From the money aspect of it, if Horn can make a good showing and even if he loses a close decision, he can get the rematch back in Australia if they can get Crawford in the country and that means a good pay day for Jeff, which is what professional boxing is all about," Sheridan told On The Ropes Boxing Radio.

Sheridan is so impressed with Crawford, that he won't believe Horn is even capable of pulling it off until he sees it with his own eyes.

"In terms of beating Crawford, I got to see Jeff beat him before I believe it because Crawford amazes me as much as Lomachenko does. It was one of these situations where Top Rank was very smart in signing Jeff Horn because they immediately get the Pacquiao fight," Sheridan said.

"In no way do they think Horn can upset Terence Crawford, but it was an organized bit of great promoting to get a piece of Jeff Horn so that they could get Crawford his first fight at 147lbs. We’ll find out just how good Jeff Horn is in a hurry. If Horn ever upset Crawford, then he’s on the map forever."