Manila: Eight-time world boxing champion Manny Pacquiao said he will "think hard" about retiring after his stunning and controversial defeat to unheralded Australian challenger Jeff Horn. Arriving home in the Philippines a day after losing his World Boxing Organization welterweight title in a major upset in Brisbane on Sunday, the 38-year-old Pacquiao said he was thinking about hanging up his gloves for good."I am also considering the opinion of people, the opinion of my family and my body," Pacquiao told ABS-CBN television on Monday"I plan to relax first and recover from the pains in my body and then after that, when I have already relaxed, that's when I will think hard about it." Immediately after the fight, Pacquiao had said he wanted a rematch with Horn.Pacquiao's wife, Jinkee, and his trainer, Freddie Roach, had said they would advise him to quit boxing after a phenomenal 22-year professional career in which he won world titles in an unprecedented eight weight divisions.Pacquiao briefly retired from boxing last year to pursue his long-held political ambitions and was elected senator. But he quickly made a successful comeback against Jessie Vargas in November, saying he still felt like a youngster.