Pound-for-pound king Manny Pacquiao has vowed to go toe-to-toe with Juan Manuel Marquez when they meet for a third time in Las Vegas on November 12. The previous two bouts between the pair have been engaging battles, with little between the two men. Marquez has always maintained that he won both, despite having to settle for a draw in their first clash and losing a wafer-thin split decision in the second.

Pacquiao's legendary trainer Freddie Roach fears for his star pupil, believing that Marquez may be the one fighter who knows how to beat the eight-division world champion.

"The last two times they fought, Manny got complacent after knocking Marquez down," said Roach. "Instead of fighting his own fight he followed Marquez and began fighting his fight - big mistake. I think Manny won both fights though Manny made them closer than they should have been.

"I'm worried that Marquez could have Manny's number. He is the only fighter who seems to have figured out Manny's style. That is why I am training Manny for the knockout - to clear the air on who is better. Manny is going to shut up Marquez once and for all - I'm sick of his whining.

"Marquez will be surprised when he faces this version of Manny. He no longer fights in one direction or with one hand. Manny has become a complete fighter. He moves laterally in both directions and he throws potent punches with both hands. Manny has so many more weapons than the last time they fought ... I think he knocks out Marquez in the sixth round."