Filipino boxing phenomenon Manny Pacquiao will face off against the undefeated WBO welterweight champion Timothy Bradley this Saturday night at the MGM Grand Garden in Las Vegas.

It's a rematch that many boxing fans are anxiously anticipating given the controversial result of their last fight. Bradley was declared the winner by split decision, ending Pacquiao's seven-year, 15-fight winning streak and causing viewers everywhere to call foul.

"I've never been as ashamed of the sport of boxing as I am tonight," said promoter Bob Arum after Pacquiao's loss, as quoted by The New York Daily News.

Most people, fans and media alike, seemed to agree with him. Pacquiao landed 94 more punches than Bradley and threw 78 fewer punches. Bradley held his own in the fight, but all in all it seemed as if Pacquiao got the better of him. Even the commentators were already calling the fight in Pacquiao's favor before the decision was made.

The aftermath of the decision had disastrous consequences for both fighters. Bradley thought the fight would bring him fame and respect. Instead, he was painted as a villain, the undeserving winner of a fight that broke the renowned and loved Pacquiao's win streak. For months he suffered from depression as he battled against ridicule and, in some cases, death threats.

Eventually Bradley emerged back on the scene with a decisive win over the Siberian fighter Ruslan Provodnikov, in which he suffered and fought through a concussion. The fight earned the respect of the boxing community. Bradley went on to defeat Juan Manuel Márquez, the boxer who knocked out Manny Pacquiao in 2012.

Speaking of Pacquiao, the loss against Márquez was a major upset in his career. He went on to beat boxer Brandon Ríos, but this was to be expected against such a lesser opponent. Many belived that Pacquiao had began to loss the fire that characterized his earlier boxing days and could be soon considering retirement.

Bradley told him as much during an HBO special, highlighting their impending rematch.

"That hunger that he's looking for, that's no longer there and he can't get it back. It's gone," Bradley said as he looked into Pacquiao's eyes. "It's gone. It is, Manny. It's gone. It's not there anymore. I truly believe that. The killer instinct, that's what I'm saying. He's not the same as far as that."

Pacquiao claims Bradley's criticism only fuels his fire.

"The more he says it the more it inspires me to show the hunger and the killer instinct he is talking about," Pacquiao said, according to ESPN. "It's good for me, but not for them, I think. I am not angry or disappointed about what he says to me but I'm happy that he has told me that because it inspires me to train hard and to focus in the gym on my game plan and focus on the fight. It is a benefit for me."

Pacquiao is looking to prove he's still got it, while Bradley wants to the silence doubters about the first match. The dramatic fight will take place Saturday at 9 p.m. on HBO Pay-Per-View.