Guerrero vs Aydin: Live Results and Round-By-Round Coverage

Showtime presents a four-fight card tonight, starting at 8 p.m. EDT on Showtime Extreme with a pair of undercard bouts, and followed by two more fights at 10 p.m. EDT on Showtime. In the main event, Robert Guerrero will face Selcuk Aydin for the interim WBC welterweight title.

[ Preview: Guerrero vs Aydin, Undercard ]

Guerrero (29-1-1, 18 KO) is making a two-division jump from lightweight after over a year out of the ring due to shoulder surgery, and Aydin (23-0, 17 KO) isn't someone he can count on to go away easily. Even if the Gilroy, Calif., native (fighting near home in San Jose tonight) can outbox Aydin, the Turk is a tough, hard-punching, determined fighter who will be there until he's truly put away, or until the bell rings to end the 12th round. This fight has potential upset written on it, but it could also be a strong comeback party for Guerrero if he gets a convincing win, which would put him in the mix at 147 pounds.

On the undercard, Shawn Porter (19-0, 14 KO) steps up in class against Alfonso Gomez (23-5-2, 12 KO) in a welterweight 10-rounder. Ohio prospect Porter has served as a sparring partner for Manny Pacquiao, and last night another Pacquiao sparring partner, Raymundo Beltran, upset Hank Lundy. That has nothing to do with anything, frankly, but it's something to take up some space. Yay!

On Showtime Extreme, England's George Groves (14-0, 11 KO) is coming to the States to face Francisco Sierra (25-5-1, 22 KO) in a 170-pound catchweight fight. Groves holds the British and Commonwealth super middleweight belts already, but hasn't fought since November. Sierra can bang, but is very limited. Still, he's dangerous.

Also on Showtime Extreme, junior middleweight prospect Hugo Centeno (14-0, 8 KO) faces Ayi Bruce (22-7, 14 KO).

We'll have live round-by-round coverage and post-fight results of each bout. Join us!