Unlock the following boxers by performing the corresponding tasks:

BOXER - HOW TO UNLOCK
Box as Apollo Creed - Win the "Apollo Creed vs. Ivan Dragon" match in Historical Fights mode
Box as Dave Fossan - Win the "Rocky Balboa vs. Cluber Lang 1" match in Historical Fights mode
Box as Joe Czak - Win the "Clubber Lang vs. Rocky Balboa 2" match in Historical Fights mode
Box as Mason "The Line" Dixon - Win the "Rocky Balboa vs. Mason Dixon" match in Historical Fights mode
Box as Rocky V - Win the "Mason Dixon vs. Rocky Balboa" match in Historical Fights mode