Mexican great Juan Manuel Marquez explains why he turned down a fifth fight with Pacquiao; even with mega-money on offer

Juan Manuel Marquez - Despite all his other considerable ring achievements, Mexican great Juan Manuel Marquez seems destined to be forever remembered mostly for his shocking, utterly stunning one-punch KO of the equally great (or greater) Manny Pacquiao.

Despite all his other considerable ring achievements, Mexican great Juan Manuel Marquez seems destined to be forever remembered mostly for his shocking, utterly stunning one-punch KO of the equally great (or greater) Manny Pacquiao.

It was in the fourth meeting between the two modern day legends when it happened: an advancing Pac Man was hit flush by a monster, perfectly timed right hand that left Pacquiao face-planted on the canvas just a second or two before the bell rang to end the sixth-round. The sudden termination to the bout, and with it the rivalry, was so shocking because the previous three encounters had all gone down to the wire, so close, debatable even as they were on the score-cards.

Read moreMexican great Juan Manuel Marquez explains why he turned down a fifth fight with Pacquiao; even with mega-money on offer