Amir Khan knocks Out Zab Judah

Amir Khan knocked out Zab Judah in the fifth round to add the IBF junior welterweight title to his WBA super lightweight crown in Las Vegas on Saturday night.

Khan and Zab Judah trade punches

Judah throws a right at the head of Khan during their super lightweight world championship unification bout.

Judah and Khan battle during the 140-pound championship fight

Referee Vic Drakulich counts out Judah in the fifth round

Khan celebrates his victory over Judah.