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.

Mario Barrios, left, and Manny Pacquiao pose after fighting to a majority draw in a welterweight title boxing match on Saturday in Las Vegas.

Manny Pacquiao appears set to move on from the proposed Mario Barrios rematch in boxing, despite only agreeing to the do-over after their first bout on Saturday. The Filipino fighter's timeless performance on the 19th of July at the MGM Grand Garden Arena belied his 46 years.