Floyd Mayweather Sr. has just recently said that he believes his son and current WBA welterweight champ Manny Pacquiao will face again. 

Speaking with TMZ Sports, the 66-year-old former boxer and now trainer told the outlet that he's "pretty sure" of the rematch. 

"I'm pretty sure that they're gonna fight... they're gonna fight again," quipped the elder Mayweather. Despite Floyd's reluctance to face his Filipino rival, Sr. believes that it will eventually happen. 

Pacquiao and Mayweather Jr. were recently embroiled in an online war of words after the latter defeated fellow American champ, Keith Thurman, last month.  

When asked about a potential rematch, Floyd shrugged off rumors, saying that "he wasn't interested in a rematch." Recently a video of him promoting a fight between the Filipino senator in Saudi Arabia surfaced. 

The undisputed American champ clarified that it was taken nine months ago when he visited the Middle Eastern country. Sr. also added that his son "will kick his (Pacquiao) ass the second, third, fourth, fifth time." 

Mayweather Jr. and Manny have talked continuously up to a rematch ever since they first fought in 2015. Floyd won via a unanimous decision, but the Filipino boxer's camp has alleged that Manny fought on an injured shoulder. 

Floyd Mayweather and Manny Pacquiao Floyd Mayweather and Manny Pacquiao look set to be meet in another lucrative boxing match. In this picture, Mayweather hugs Pacquiao after defeating Pacquiao in their welterweight unification bout at the MGM Grand Garden Arena in Las Vegas, May 2, 2015. Photo: JOHN GURZINSKI/AFP/Getty Images

In 2016, Jr. told ESPN that he would grant a rematch to Pacquiao once he fully recovers from the rotator cuff injury. Last year, rumors of the rematch pushing through headlined for a couple of weeks, but was subsequently canceled due to failed negotiations between both camps. 

Since their match four years ago, Pacquiao has won five out of six fights, including a knockout win against Lucas Matthysse last year. His only loss came from a contentious decision against Australian Jeff Horn two years ago. 

Meanwhile, Mayweather has only fought twice since beating the Filipino icon in 2015. He beat Andre Berto in the same year, while he fought UFC's lightweight champ Connor McGregor in 2017. 

Jr. later announced his retirement that year, racking up a 50-0 undisputed record to edge Rocky Marciano's record by one win. 

Talks of a rematch were again revived after a 40-year-old Pacquiao rallied to win against the former undefeated champion, Keith Thurman last month. 

Manny is currently the WBA "super" welterweight champion. His camp has said that the champ will be taking the rest of the year off. He plans to fight on 2020 possibly against the winner of the Errol Spence, Shawn Porter unification match in September.