Muhammad Ali looked to be unstoppable during his prime years. Ali’s prime is widely considered to be during the mid-to-late 1960s, where he had become undisputed heavyweight champion and compiled an unbeaten record of 29-0 with stoppage victories over the likes of Sonny Liston and Floyd Patterson.

Floyd Mayweather is one of the biggest draws in boxing history and by consensus one of the greatest fighters of all time. 'Money' Mayweather retired with professional record of 50-0-0, having 27 knockouts and a 54% finish rate. Mayweather's net worth is ...

Lévy Gorvy Dayan gallery is offering the portrait at Art Basel Miami Beach, which is signed by the boxing legend.