MMA Fighting has a Manny Pacquiao vs. Juan Manuel Marquez 4 live blog for round-by-round updates for one of the top boxing fights of the year.

The main event will start a little after 11:30 p.m. ET. Check out our Pacquiao vs. Marquez results page to find out what happened on the undercard.

Check out the Pacquiao vs. Marquez main event live blog below.

Round 1: Pacquiao, as expected, opens as the aggressor. Marquez and Pacquiao pawing with jabs and Pacquiao lands a very good left. Another good left and they're trading shots. Another good left and uppercut by Pacquiao.

MMA Fighting scores this round 10-9 Pacquiao

Round 2: Marquez leans in on a left hook and misses. Pacquiao is pressuring, but not overly so. Marquez is landing on the inside, but so is Pacquiao. Another good left by Pacquiao and another. That was hard. Good left hook for Marquez.

MMA Fighting scores this round 10-9 Pacquiao

Round 3: Marquez wings a left hook and it's blocked. PAcquiao is aggressing, but a little more measured. Right and a left for Pacquiao lands. Good left to the body for Marquez. And another. Huge overhand right floors Pacquiao. That's a real knockdown. Pacquiao pushing forward, but no they're swinging in the middle.

MMA Fighting scores this round 10-8 Marquez

Round 4: Pacquiao still aggressing, but so far nothing major in this round. Both fighters trade lead hands. Pacquiao pushing in, but eats a counter shot from Marquez. Good, short punches inside by the Filipino. The fighters again trade shots in the middle, but Marquez gets the better of them generally speaking.

MMA Fighting scores this round 10-9 Pacquiao

Round 5: Good left from Pacquiao as he scores the first shot of the round. Left hand drops Marquez and that's a knockdown. Pacquiao eats another shot, but this is still his round...so far. Pacquiao eats a left but he he's still pushing forward. This is incredible. These two are eating what can only be described as unreal.

MMA Fighting scores this round 10-8 Pacquiao

Round 6: A Manny flurry lands hard, but Marquez responds with a left of his own. Pacquiao lands repeatedly with punch combinations and then angle cuts. Pacquiao really putting the pressure on Marquez trying to put him against the ropes. Big left partially wobbles Marquez until he hits Pacquiao with a MONSTER left that puts Pacquiao down. He is out COLD. Unbelievable. Marquez has KO'd him flat cold.

Juan Manuel Marquez def. Manny Pacquiao via KO at 2:59 of round 6