Bolton's former world light-welter champion Amir Khan resumes his career on UK soil this evening knowing there's no margin for error. I expect the 2004 Olympic silver medallist to win by stoppage in his trumpeted homecoming against Mexico's Julio Diaz at Sheffield's Motorpoint Arena. His 33 year old California based opponent has been stopped five times previously. However, any slip ups will see 'King Khan's' earning capacity dip drastically and his future opportunities seriously diminish and leave him in the boxing wilderness.