Former world champion Barry McGuigan insisted Amir Khan's courage cannot be questioned following his controversial defeat to Terence Crawford.
Crawford accused Khan of quitting after their WBO welterweight title fight at New York's Madison Square Garden had been stopped in the sixth round.
Khan, 32, had been knocked down in the opening round and was taking regular punishment before Crawford landed a sickening low blow and his corner indicated he could no longer continue 47 seconds into the round.
