LAS VEGAS- British boxer of Pakistani origin Amir Khan today defeated Devon Alexander in a welterweight fight, using his superior hand speed and power to dominate the match for 12 rounds.

The 28-year-old Khan consistently beat Alexander to the punch, jabbing his way to success in the non-title fight on all three judges' scorecards, 120-108, 119-109 and 118-110.

“I think it was one of my best performances,” said Khan , who looked unscathed except for a welt under his left eye. 

Khan effectively earned points as both fighters made it to the final bell in front of a crowd of 7,768 at the MGM Grand Hotel and Casino. Khan also showed off his defensive skills, the result of training with trainer Virgil Hunter in September 2012.

Alexander, who looked impressive in his last fight against Jesus Soto Karass, went into the 12th round needing a knockout to win. Khan was originally scheduled to fight the American for Alexander's International Boxing Federation welterweight title last December in New York.