Former middleweight boxing champion Mayweather faces UFC star McGregor in a crossover fight on Saturday, August 26.

According to reports, about 7, 000 tickets are still unsold less than four days before the fight.

ALSO READ: Mayweather will quit for good after this fight

Ahead of the clash, the two fighters are confident that they are going to knock each other out in the match.

“The fight is not going the distance, no matter what he says. He's getting knocked out,” Mayweather said.

McGregor replied saying; “'I believe I am going to knock him down in the first round because be sure I am going to start fast.

“After that, maybe I will toy with him for two or three rounds and it's possible the referee will have to step in and stop it.

“Come Saturday night, the king of the UFC will be the king of boxing as well."

They both made an entrance at the venue of their upcoming clash with hundreds of fans cheering them.