Clottey comes out jabbing. Cotto counters with a quick 1-2 but misses with a follow-up left hook. They are taking turns being the aggressor. Clottey is finding his range on the jab and follwed with a short uppercut that lands. Cotto knocks Clottey down just as the round was ending with a beautiful punch!

Joshua Clottey (left) and Miguel Cotto didn't hold back at Madison Square Garden. ( / Associated Press)

No ill effects so far from the knockdown. Clottey lands two short uppercuts. It looks like that punch will be there all night. Cotto is working the body while Clottey is doing a good job mixing up his punches. Another short uppercut from Clottey followed later by an overhand right. Clottey wins this round on my scorecard but Cotto's still up because of the knockdown.

Clottey is keeping Cotto on the defensive while landing from a variety of angles. A sharp right hand from Clottey lands on Cotto's head. Clottey is definitely the quicker fighter early on. Cotto has a cut over his left eye that looks pretty bad. It came from an accidental headbutt. The doctor is looking at it.

Cotto lands a couple of body shots early. Clottey counters with a combination. The crowd tries to rally Cotto, who is more aggressive this round. It's getting him in trouble though, as Clottey lands several big shots. Cotto momentarily has Clottey in the corner but can't capitalize. Cotto finishes the round strong with several good power shots, though.

Cotto is aggressive early. Neither fighter is backing down at this point. Clottey lands a pair of 1-2's and continues to pepper Cotto's eye with his jab. Clottey lands a big right hand but Cotto responds with a flurry in the corner. The two get rough in the corner and Clottey ends up on the ground after Cotto threw him down. He's in obvious pain but the referee is giving him time to walk it off. The action resumes with Cotto doing much of the work. Clottey responds with a good shot right before the bell.

Cotto is doing major damage. He has Clottey against the ropes and Clottey is looking to weather the storm. Clottey briefly fights out of it but Cotto gets him back in the corner, tagging him repeatedly. The entire round was basically fought in the corner with Cotto doing most of the damage. You could make the case for a 10-8 round for Cotto but Clottey did land a few shots of his own.

A big uppercut from Clottey backs Cotto up. Cotto looks like he needs a round off and is fighting like it so far. Clottey is trying to take advantage of it and lands a big right hand. He gets Cotto against the ropes and lands a 1-2. Another uppercut. This round was all Clottey

Cotto gets Clottey on the ropes briefly, but Clottey fights his way out of it and stuns Cotto with an uppercut. He follows that with a big right hand. Cotto's eye is bleeding again and he appears to be having trouble with it. Later in the round Cotto tags Clottey repeatedly in the corner but Clottey emerges with a smile on his face and a shake of his head as if to say, "You can't hurt me."

This looks like Cotto/Margarito all over again. Cotto appears to be tiring and Clottey is stalking him. Clottey lands a big right hand. Cotto gets him against the ropes again but can't hurt him. Clottey comes back with a few shots of his own. The fighters trade punches as the bell sounds.

We all know how judges can be, but right now I have the fight 86-84 Clottey with three rounds to go. Six rounds to three, with Cotto getting a 10-8 round with the knockdown in the first. Neither fighter is doing a lot in this round, which could come back to haunt somebody. The fighters again trade big shots as the bell rings.

Both fighters look a bit weary, as well they should after what they've been through. This fight is up for grabs. Cotto is backing up but counterpunching effectively. Clottey lands a big left hook late and applies the pressure in an attempt to steal the round.

The final round begins. The crowd tries to pump up their hero, chanting "Cotto! Cotto!" repeatedly. Cotto lands a big left hook and Clottey follows with a power shot of his own. Cotto hits Clottey on the back of the head after spinning him around. Cotto is warned for a low blow. Clottey lands the final big shots before the final bell sounds. We go to the scorecards.

Cotto wins a split decision. One judge had it 116-111 Cotto, another 114-113 Clottey. The third judge scored it 115-112 Cotto.

I scored it 114-113 for Clottey. Seven rounds to five with Clottey losing a point because of the knockdown.

Undefeated prospect Matt Korobov improved to 6-0 with a unanimous decision over Loren Myers.

The 26-year-old Korobov won every round on all three scorecards as he consistently beat Myers to the punch.

The Russian-born Korobov had Myers in trouble in rounds two and three but could not get him to the canvas. This is the first time in Korobov's young career that he was forced to go the distance.

An accidental head butt by the challenger opened up a gash on Ivan Calderon's head but the 34-year-old junior flyweight champion held on to his title with a draw after his fight against Rodel Mayol was stopped in the sixth round.

Ivan Calderon (left) and Rodel Mayol fought in close quarters all night. (Al Bello / Getty Images)

The fighters clashed heads repeatedly and in the fourth round, Calderon suffered a cut on his forehead. Two rounds later, the ringside physician deemed Calderon unable to continue. Under WBO rules, the contest went to the scorecards, with one judge giving the fight to Calderon 58-56 and another giving it for Mayol by the same score. The third judge had it 57-57.

After taking the first round to feel each other out, the two fighters began mixing it up in Round 2. Mayol was the aggressor early while the speedy southpaw from Puerto Rico was content to stick and move.

Neither fighter was able to mount any consistent attack before the headbutts started, making it a tough fight to score. There was a brief flurry from Calderon after the initial clash of heads, much to the crowd's delight but another head butt slowed that down.

CompuBox numbers were nearly identical, with Calderon throwing 269 punches and landing 55 (20 percent), and Mayol throwing 289 and landing 58 (20 percent)

Calderon's record is now 32-0-1 (6 KOs) while Mayol is now 25-3-1 (19 KOs).

Mexico native Rafael Guzman had a tough time figuring out fellow countryman Juan Carlos Martinez but managed to pull out a split decision.

Guzman (22-1, 16 KOs) controlled the first half of the fight but seemed to tire in the later rounds as Martinez (14-10-1, 5 KOs) mounted a late comeback.

Neither fighter appeared to be hurt during the contest but Guzman showed enough to impress the judges and earn the victory. Two judges scored the fight for Guzman (59-55 and 58-56) while one judge scored it 58-56 for Martinez.

Jason Velez scored a 4th-round TKO over Jesus Bayron.

Velez (9-0, 7 KOs), from Puerto Rico knocked Bayron down twice in the third round and had him trouble again in the four before referee Earl Brown stopped the fight 33 seconds into the round. Bayron, also from Puerto Rico, is now 5-2 (4 KOs).

Undefeated local prospect Jorge Diaz (8-0, 5 KOs) got the crowd going with a convincing victory over Guadalupe De Leon (7-6, 4 KOs).

Diaz won by scores of 58-54, 59-53 and 59-53.

Sporting a Puerto Rican flag on his trunks, Diaz, who fights out of Jersey City, N.J., jumped all over De Leon from the opening bell, knocking him down seconds into the fight and following it up with another one-punch knockdown right before the bell sounded to end the round.

De Leon made it through the round but Diaz continued the assault in Round 2, pinning De Leon against the ropes several times and unloading with a series of shots both upstairs and to the body.

The pace slowed in rounds three through five, but Diaz was still able to land effectively while controlling the fight. In Round 6, with the crowd cheering him on, Diaz finished with a flurry as the two stood toe to toe for the final minute of the contest.

The 21-year-old Diaz improved to 9-0 (5 KOs) while De Leon dropped to 7-7 (4 KOs).

Tapia (3-0, 2 KOs) defeated David Lopez by unamious decision in a four-round middleweight contest and Cruz (5-0, 4 KOs) stopped Rudy Valdez by third-round TKO in a lightweight matchup.