"And I thought Pacquiao won the fight, if you go by the rules - the Marquess of Queensberry rules - who lands the cleaner punches!" "She's pregnant. Thank you for your love and support".
An emotional Horn brandished a walking stick as he also called out the undefeated Mayweather, who has come out of retirement at 40 years of age for a 12-round crossover boxing match against mixed martial arts champion Conor McGregor. Pacquiao landed 32 percent of his punches, Horn landed 15 percent.
Horn, 29, was aggressive from the opening bell, although Pacquiao's left jabs scored points in the early stages.
After the fight, Pacquiao didn't argue his case or complain that he was robbed. He was awarded the victory by unanimous decision. Two judges scored the fight 115-113 while the third had it 117-111, a result that has caused much outrage from the boxing community.
That's exactly what happened when Horn survived a ninth-round scare before posting the biggest win of his young career. Horn though was more than willing to slug it out as an epic fist fight closed out the show. "I'm not a quitter. He has to hurt Manny with that big right hand he has". We've showed we're winners.
Based on the statistics shown on the broadcast, Pacquiao landed more punches and was the more efficient fighter.
As post-fight celebrations kicked off, Horn told his cousin and 9NEWS sports editor Cameron Williams about the win.
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Williams and Horn share a moment after the stunning win. That's how one-sided the odds were coming into the fight.
Horn has now improved his record to 18-0-1.
Pacquiao was expected to make $10 million while Horn's take was to be $500,000.
"Overall I thought it was a good fight".
Despite the loss, Pacquiao said he respected the decision and said he would "absolutely" return for the contracted rematch.
"Walang problema sa akin ang rematch", said the ring legend, hinting he still plans to keep on fighting.