Old foes Manny Pacquiao and Juan Manuel Marquez have a fourth and probably last go at each other in Las Vegas this weekend in one of the most anticipated boxing clashes of the year.
The two have been at each other for the last eight years, Pacquiao winning the last two after the first ended in a draw.
Both fighters are predicting a knockout in the bout which doesn't have a world title on the line.
The 33-year-old Pacquiao hasn't stopped an opponent in his last five fights, spanning three years and the Phillipine wants to discover his old form when he sent opponents to the canvas on his way to winning eight world titles in eight different divisions.
The 39-year-old Marquez from Mexico feels he should have won their last clash and says he's leaving nothing to chance.
The bout is on Sunday, NZ time.