The three-time Tour de France champion Alberto Contador's doping case will be heard before the Court of Arbitration for Sport in Lausanne, Switzerland, over three days from June the 6th to 8th.
The World Anti-Doping Agency and world cycling's governing body, the UCI, are appealing the Spanish cycling federation's (the RFEC) decision to acquit the Spaniard over a failed doping case.
Contador tested positive for a tiny amount of the banned muscle-building substance clenbuterol during last July's Tour, which he went on to win.
But he was cleared to compete when the RFEC rescinded an initial decision to hand down a one-year competition ban, accepting the rider's claim that he had unknowingly consumed drug-contaminated meat and was therefore not negligent.
UCI president Pat McQuaid said the UCI had been left with no choice but to appeal the RFEC decision because the case had suffered from political interference in Spain, where Contador received support from those in high government.
CAS have promised to make a decision before the start of July's Tour de France.