Manny Pacquiao's return to the ring at the weekend after a four-year hiatus marked the latest example of a boxer well past his prime who could not resist the temptation of the squared circle and a chance to add to his competitive legacy.

After Saturday's draw with Mario Barrios, Manny Pacquiao – who turns 47 in December – said he believes he could return to fight again by year’s end, preferably against a champion.