Sergio Martinez basically retired to today. Martinez who in an interview with La Nacion, Argentinian news outlet, explained his knee is shot, a statement that is not very remarkable when looking at the condition of his knee last year when losing to Miguel Cotto on pay-per-view. Martinez, who had a fantastic boxing career will be remember for some of hist best moments against Kelly Pavlik and Paul Williams as well as his lows in which his body began to fail him late in his career.