April 7
At Cardiff, Wales (HBO): Joe Calzaghe vs. Peter Manfredo Jr., 12 rounds, for Calzaghe's Ring/WBO super middleweight title; Amir Khan vs. Steffy Bull, 10 rounds, lightweights; Enzo Maccarinelli vs. Bobby Gunn, 12 rounds, for Maccarinelli's WBO cruiserweights title
At Springfield, Mo...