Chambers lamented the effects of his drug use and noted the irony that the drugs did not do much to improve the consistency of his performances. On his return to international competition his times were significantly worse than he achieved prior to drug use: in the 100 m final at the 2006 European Championships, Chambers ran a sub-par 10.24 s and finished in fifth place. He was part of the gold medal-winning British 4×100 m team, but Darren Campbell, who was angry about losing his 2002 and 2003 relay medals due to Chambers' ban, refused to join the team in a celebratory lap. After the competition, Chambers again expressed an interest in switching to American football, and completed a week-long NFL Europa training camp in Cologne that November.