The 11-time world champion entered the fight at Suncorp Stadium as a hot favorite but got more than he bargained for against the 29-year-old former schoolteacher.
Still, Pacquiao dominated the later rounds and had Horn wobbling at the end of the 9th.
"I felt buzzed for sure, but I'm the Hornet, I've got to come back," Horn said of that round. "I'm not a quitter. Australians aren't quitters to start with. We've showed we're winners.
Pacquiao's long-time trainer Freddie Roach predicted the fight would be short and sweet but Horn -- unbeaten in his 17 previous professional fights -- applied pressure by winning some of the early rounds and Pacquiao needed treatment during the 6th and 7th rounds for a cut on the top of his head that resulted from a clash of heads.
The judges scored the fight 117-111, 115-113 and 115-113, and Horn declared himself "no joke."
Roach had said earlier in the week that he'd think about advising Pacquiao to retire if he lost the fight, but that would depend on how he fought.
"I'm sure he'll want to come back. It was a close decision and I'm sure he'll want to come back and prove himself," Horn said.
Top Rank promotor Bob Arum said there was a clause for a rematch, but he'd give it time before talking to Pacquiao about it.
"I know Jeff would welcome the rematch, but I don't know Manny's future position," Arum said. "Is he going to stay in politics and not continue in boxing? I don't know, and he doesn't know now - it's unfair to ask him now."
Pacquiao, who entered the fight with a record of 59-6-2, 38 knockouts, was defending the WBO title he won on points against Jessie Vargas last November.
Disclaimer: No Business Standard Journalist was involved in creation of this content
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Exclusive premium stories online
Over 30 premium stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app
