BRITISH BOXER Amir Khan silenced many of his critics with a masterful performance in Las Vegas where he knocked out Zab Judah in the fifth round.
In the light-welterweight unification fight, 24-year-old Khan, who was defending his WBA belt, was expected to be pushed to the limit of his abilities by veteran IBF champion Judah.
But it was not to be. Khan took charge from the first round, forcing the fight and landing at will with his swift jab.
The fifth round ending came when Khan landed a massive right punch to Judah’s body and the American was unable to make the count.
At first glance the blow looked slightly low, but video replays showed it struck Judah's belt line and was not totally legal.
"He went down and it was above the belt," Khan, who will now target the winner of September's clash between Floyd Mayweather and Victor Ortiz, told BBC Radio 5 live.
"It was nowhere near below the belt, it was a great shot. Zab's a great fighter. I respect him a lot."
Judah did not agree with his rival's assessment, claiming: "Everyone in world who saw the fight will see that's a low blow. I thought he [the referee] was giving me time to get up.”