The suspended Australian cyclist Michael Rogers insists he never knowingly took clenbuterol and will try to clear his name.
Cycling's world governing body the UCI announced on Thursday that the three-time world time trial champion and Olympic bronze medallist had tested positive to the banned substance.
Roger has released a statement, protesting his innocence.
Rogers tested positive after winning the Japan Cup in October, days after competing at the Tour of Beijing.
Rogers' team-mate at Saxo-Tinkoff Alberto Contador also tested positive to clenbuterol at the 2010 Tour de France.
Contador argued that the positive result was due to contaminated meat, but his appeal failed and had to serve a ban.
