Recap: In one of the biggest upsets in boxing history, a determined Jeff Horn (17-0-1, 11 KOs) won a controversial unanimous decision over Manny Pacquiao (59-7-2, 38 KOs) to capture the WBO welterweight championship on Sunday in Brisbane, Australia.

The three judges scored the fight 117-111, 115-113 and 115-13. International Business Times scored the fight 117-111 for Pacquiao.

According to CompuBox, Pacquiao landed 182 power punches compared to Horn's 92. Horn landed just 15 percent of his punches.

Pacquiao seemed to be a bit casual with some rounds against Horn, measuring Horn with some cautious punches. But late in the fight, Pacquiao was aggressive after suffering accidental headbutts.

After Round 9, referee Mark Nelson almost stopped the fight. Pacquiao had battered Horn, who had severe swelling on the right side off the face. Horn's corner pleaded with Nelson to continue the fight.

Pacquiao entered the fight as the heavy favorite. He was listed at -650, while Horn was the underdog at +475.

When asked if Pacquiao agreed with the decision, he was gracious in defeat.

"That's the decision of the judges. I respect that," Pacquiao said.

When asked about a rematch, Pacquiao said "absolutely."

It was a huge moment for the determined Horn, a relative unknown. He fought in front of roughly 55,000 fans in his hometown and absorbed some hard power punches from one of the greatest boxers ever.

"I felt fine," said Horn about the punishment he received in Round 9.

Horn later added that he felt he out-pointed Pacquiao and also that he landed cleaner punches.

Indeed, the fight did have some close rounds. The rematch clause might be invoked, according to both boxers.

In the post-fight interview, Horn announced that his wife was pregnant. He called Pacquiao a "legend."

Preview: Manny Pacquiao (59-6-2, 38 KOs) defends his unified WBO welterweight title against Jeff Horn (16-0-1, 11 KOs) on Sunday afternoon (Saturday night in the U.S.) at Suncorp Stadium in Brisbane, Australia. Pacquiao enters the fight as the betting favorite, while Horn, a native of Brisbane, enters as the fan favorite in front of what could reach nearly 60,000 spectators.

Pacquiao, 38, is coming off unanimous decision victories over Timothy Bradley and Jessie Vargas in 2016 after losing to Floyd Mayweather in May 2015. Horn, 29, lacks a signature win, despite his undefeated record. 

Much of the attention surrounding the fight has centered on the broadcasting rights. Pacquiao normally fights on pay-per-view but this time the fight will be shown on basic cable network ESPN. 

The three judges are Waleska Roldan (New York), Chris Flores (Arizona) and Ramon Cerdan (Argentina). The referee is Mark Nelson.

On the undercard, IBF super flyweight champion Jerwin Ancajas (26-1-1, 17 KO’s) of Panabo City, Philippines, defends his title against Teiru Kinoshita (25-1-1, 8 KO’s) of Osaka, Japan.

Here is how International Business Times scores the Pacquiao-Horn 12-round fight:

Round 1

In the opening minute, it's all Horn as Pacquiao absorbed some decent punches. Pacquiao appeared to show little aggression though he didn't appear hurt. Horn's mouthpiece came out after a flurry. Solid showing by Horn in the early going.

Horn, 10-9

Round 2

Horn with some confidence in the opening minute, but Pacquiao hasn't been hurt by any exchanges. It's been a technical fight, thus far. Horn has used some decent lefts that connected on Pacquiao's body. But Pacquiao was able to land a strong left hook. He was also able to connect in the final 30 seconds that landed flush on Horn's chin.

Pacquiao, 10-9

Round 3

Horn held his own in the first half of the round but has looked vulnerable to power punches. There is a bit of a cut over Horn's right eye. Horn was a bit more aggressive than Pacquiao before Pacquiao came back to close out the round strong. Close round.

Pacquiao, 10-9

Round 4

Pacquiao slipped in the opening minute. Horn appears to be willing to brawl with Pacquiao, but Pacquiao has not allowed himself to be hit by a significant punch. Horn seemed to land a decent uppercut that caught Pacquiao off guard in a relatively quiet round.

Horn, 10-9

Round 5 

Horn began the round with a decent flurry, as Pacquiao appears to be giving Horn a lot of respect at this point. But Pacquiao was able to land some powerful lefts that seem to be targeting Horn's right eye. Good round for the Filipino legend.

Pacquiao, 10-9

Round 6

Horn showed his height advantage in the opening minute by pushing Pacquiao against the ropes and connecting on an uppercut. There was an accidental headbutt that left Pacquiao bleeding from the top of the head. In the last minute, Horn was able to land clearly the best punch of perhaps his career, and certainly the fight, with a solid right hand. 

Horn, 10-9

Round 7

Horn has exceeded expectations, as he reached the seventh round and looked decent in the process. Pacquiao was able to land a strong right. In the final minute, Pacquiao was hit by another accidental headbutt. Exciting flurry in the final 30 seconds resulted in some good punches by both fighters. On another note, it's been a good officiated fight by Nelson.

Pacquiao, 10-9

Round 8

Horn slipped near the midway point of the round. In the final minute, Pacquiao didn't seem to exploit the openings from Horn. Tough round to call because there weren't any serious punches by either boxer.

Even, 10-10

Round 9

Horn doesn't look fatigued as he comes out quickly to start the round. However, Pacquiao seemed to wake up midway through the round, landing serious punches that were hurting Horn. Pacquiao did a great deal of damage and Horn's face looks awful. Horn probably can't continue.

Pacquiao, 10-8

Round 10

Horn deserves credit for continuing to fight. In the first minute, Horn was more active than Pacquiao, who may have been a bit tired because of the active ninth round. The pace picked up a bit in the final minute with Pacquiao showing a bit more aggression.

Pacquiao, 10-9

Round 11

Pacquiao looked more active in the opening minute than in previous rounds, but he hasn't found that knockout punch that has eluded him. There wasn't much action overall but Pacquiao seemed to do a little bit more by landing some decent lefts.

Pacquiao, 10-9

Round 12

Some good exchanges in a close round. Give huge credit to Jeff Horn for going the distance, but Pacquiao won this round and won the fight.

Pacquiao, 10-9

IBT Scorecard

Pacquiao wins by decision, 117-111

Final Scorecards

Horn wins by unanimous decision! (Waleska Roldan) 117-111, (Chris Flores) 115-113 and (Ramon Cerdan) 115-13