"I'm here again for another big fight. I'm so thankful to the fans for all their support," Pacquiao said at the final press conference this week.

Barrios is scheduled to defend his title against Pacquiao, who announced he was coming out of retirement nearly four years after his last fight, on July 19 at MGM Grand Garden Arena.

"I feel excited!" Pacquiao told TMZ. "I mean, I'm still feeling like when I was [in my] 20s, late 20s, like still the same. Because boxing is my passion."