You get found out very quickly in boxing, there have literally hundreds of what they call 'Gym' champions, someone who is outstanding in the gym and in training, but the moment they enter the ring and someone hits them back everything they have learned remains in the training gym. Every boxer gets hit at some point (even Floyd) it's how you react to that and respond in turn that makes or breaks you. As the old saying goes "hit and don't get hit" Abilene saloon owner Phil Coe, who stated he could "kill a crow on the wing," (flying) is one of the Old West's most famous sayings, and it showed that Wild Bill Hickok was certainly a cool customer in a fight. He answered Coe by sneering, "Did the crow have a pistol? Was he shooting back? I will be.
In boxing the other guy fights back and unless you are very good you will get nailed at some point! Flintoff can leave his boxing career in the gym from now on.