Undefeated boxer Floyd Mayweather Jr. savors his victory against eight-division world champion Manny Pacquiao as the sweetest and most important of all.

Mayweather explained to local reporters in Moscow, Russia why he was wearing a T-shirt with the number "48" largely printed on the front, Boxing Scene noted.

"This [shirt] is in honor of my 48th victory, which is the most important of my career. A lot of people said that I avoided this fight. A lot of people said that I couldn't win the fight. But I proved all of that was wrong, and therefore the fight against Manny Pacquiao is the most important for me," the fighter dubbed as "The Money" said.

Mayweather defeated the 36-year-old Filipino icon on May 2 at the MGM Grand Arena in Las Vegas via a unanimous decision, per BoxRec.

However, after that fight, the American boxing great met former titleholder Andre Berto on Sept. 2 at the same venue. He also triumphed against Berto via a unanimous decision, earning him his 49th win in his career. That win against Berto could have been his most treasured match ever as it tied him to Rocky Marciano's 49-0 win-loss record.

Yet, it is clear that his May 2 has a special place in his heart and mind. His fight against "Pacman" is what their fans have waited for five years, per an ESPN report. All eyes were on the two fighters, as evident by how the megafight broke all boxing records that day.

Fox Sports noted that the event generated 4.4 million Pay-per-view buys from boxing aficionados. Mayweather and Pacquiao also earned the two top slots in World's Highest Paid Athletes of Forbes magazine in 2015, with an estimated $300 million and $160 million pay, respectively.

More importantly, when he was proclaimed the winner, he was able to show his critics that he was better than Pacquiao, the same man several people thought would be the one to serve his first loss.

Meanwhile, his father and trainer, Mayweather Sr., shared with On the Ropes Boxing Radio that he is not that impressed with the Philippine boxing pride. However, he described how he would remember "Pacman."

"I'll look at him like a man that was chasing Floyd for years to fight, a fight that was an easy fight for Floyd. I told everybody that the fight was easy. I don't care how long they waited, when the fight took place, Floyd did what he said he was gonna do," the trainer said.

Does this mean that Mayweather vs. Pacquiao II is really not going to happen anymore?

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