defend his Commonwealth title against late replacement Gairy St. Clair at the ExCel Arena, London. It was his first fight to last all twelve rounds and he won via a unanimous decision, with shutout scores of 120–108 from all three judges. On 5 April 2008, Khan beat Kristjansen, dropping him three times in the seventh round to force a technical knockout (TKO) stoppage. Following the victory, Khan was made number one contender for the WBO lightweight title. Following the fight, Khan split from his trainer Oliver Harrison, the trainer for all of his previous 17 professional contests. The break-up was blamed on Harrison's concerns that Khan's public engagements were interfering with his fight preparations. Dean Powell, who has trained former world champions Duke McKenzie and Lloyd Honeyghan, worked with Khan until a decision on a permanent trainer was made. In the same month, Khan had a training session in Las Vegas with Roger Mayweather, trainer and uncle of Floyd Mayweather Jr. Khan fought on 21 June 2008, at the National Indoor Arena in Birmingham against Irishman Michael Gomez, a former WBU super-featherweight champion. Khan knocked Gomez down twice in the fight, once in the opening round, and once in the fifth before the referee waved the fight off, giving Khan the victory via TKO. Still, Khan himself was hurt at various times during the fight, and was himself dropped in the second round. Despite Khan's eagerness at a world title shot, his promoter, Frank Warren, insisted that "He needs more schooling". Khan vs. Prescott, Fagan Following the Gomez fight, Jorge Rubio was installed as Khan's new trainer. In early August, the lightweight Breidis Prescott was put forward by Rubio as Khan's next opponent. Rubio had previously coached Richar Abril, who had recently lost a close decision to Prescott. Prescott had a prolific knock-out record of 17 KOs in 19 contests, yet Khan was a huge favourite. The fight took place on 6 September 2008 at the Manchester Evening News Arena, it was Khan's Sky Box Office debut. In the first round, Prescott came out fast and landed good shots; a stiff jab jerked Khan's head back and foreshadowed what was to come. Prescott landed a left hook on Khan's temple, dizzying his senses. Instead of holding, Khan tried to fire back, but was hit to the head by a left hook, right hook combination that sent him crashing to the