Khan's rematch thrown into doubt

Asif Vali has said he believes the May 19 rematch between Lamont Peterson and Amir Khan in Las Vegas will go ahead.

Khan's business manager said he was in "shock" when he took the call late on Monday to learn the American champion had failed a random drug test by the Voluntary Anti-Doping Association (VADA) and the Mandalay Bay Hotel showdown was now in doubt.
Peterson, who defeated Khan in controversial circumstances to win the WBA and IBF light-welterweight titles by split decision on December 10, reportedly gave a urine sample on March 19 which tested positive for synthetic testosterone.
Asked whether the Las Vegas rematch was on or off, Vali told Sky Sports News: "The fight's on. Obviously the Nevada commission will come back to us with their findings. They'll look at things quite in depth before they make a final decision. That decision's due to come to us by the end of play on Tuesday."
Bolton fighter Khan is expected to give his reaction to the British media about the situation on Tuesday evening.