Amir Khan stopped Zab Judah with a body shot at 2:47 of the fifth round of their 140-pound title-unification bout Saturday in Las Vegas.
Khan (26-1, 18 knockouts) dominated Judah (41-7, 28 KOs) from the opening bell with his sharp, consistent jab and effective aggression, which seemed to break Judah down.
Judah was difficult to hit cleanly but landed only 20 punches the entire fight, according to CompuBox stats, an indication that he was lost against Khan, who landed 61 punches.
Judah seemed to be bothered by an accidental head butt in the first round.
Judah was bent over when Khan unloaded a right uppercut that landed on the belt line, replays indicated. Judah, who claimed the punch was a low blow, went to the ground in apparent pain and failed to beat the count.
Khan, who now holds the WBA and IBF junior welterweight titles, has won eight consecutive fights since his only loss, a first-round knockout against Breidis Prescott in 2008.
A more-detailed report is coming soon.