Two days after the Filipino inflicted a punishing defeat on him, Margarito said, "I gave it all I had but unfortunately I was not able to get the victory over the best fighter in the world today."
"It was a tough and difficult fight for me," the Mexican added.
"Pac-Man" took a unanimous 12-round decision to claim the WBC super-welterweight crown by delivering such a lopsided beating that the Mexican's eyes were swollen shut and his face bruised and bloodied.
Doctors have scheduled surgery on a broken right orbital bone for Tuesday, once Margarito's facial swelling had subsided.
Margarito hopes to fly to Los Angeles on Wednesday on the way to his Tijuana home. "I was never going to quit and tried to win this fight to the very last minute," Margarito said.
Pacquiao, a congressman in the Philippines, will perform a concert in Lake Tahoe on Tuesday and then fly home after stretching his winning streak to 13 fights and improving his record to 52-3 with two drawn and 38 knockouts.