Horn-Pacquaio round-by-round summary

Round 1 - A great start from Horn, swarms over Pacquiao from the start and lands all the best punches, with the champ hardly throwing anything of substance.

Round 2 - Slight edge to Pacquiao, who lands a good left to the body and Horn is cut over his right eye from a head clash.

Round 3 - Horn makes a great start but Pacquiao storms back in the latter stages with some good shots.

Round 4 - Horn pushes Pacquiao to the canvas early and lands a big right hand and the better shots through the round.

Round 5 - A terrific round with both men landing solid shots, Horn more early on and Pacquiao late.

Round 6 - Pacquiao cut by accidental head butt one minute in. Horn dominates with non-stop pressure and a greater volume of punches with the champion landing little.

Round 7 - Accidental butt opens up more blood on Pacquiao, Horn opens up after the delay and banks another round with some more solid right hand shots. Round 8 - Pacquiao shows more urgency, clips Horn with some good shots and backs him up to take the round.

Round 9 - Pacquiao dominates, hurting Horn and tagging him with several big blows, and the challenger barely makes it through the round.

Round 10 - Horn get his legs back and avoids trouble,with Pacquiao doing enough to take the round.

Round 11 - Pacquiao lands a big left hand but Horn hangs in there and lands some good shots of his own.

Round 12 - A scintillating end to a great fight, both land good shots with Horn backing up the champion in the closing seconds to shade the round.