Chris Froome stands to retrospectively become Britain's first Grand Tour winner and add a seventh title to his collection after 2011 Vuelta a Espana champion Juan Jose Cobo was found guilty of a doping violation.
he UCI announced on Thursday that Cobo had been found "guilty of an anti-doping violation (Use of a prohibited substance) based on abnormalities from 2009 and 2011 detected in his Biological Passport".
As a result he was ruled ineligible for a three-year period and will lose his 2011 Vuelta crown. Froome finished second in the race with Bradley Wiggins third.
The news comes with Froome in intensive care in France following a serious crash on Wednesday which has ruled him out of the Tour de France.
Cobo, riding for Geox-TMC, won the 2011 Vuelta by just 13 seconds from Froome, with Wiggins one minute 39 seconds down in Spain.
The 38-year-old Spaniard has one month in which he can launch an appeal against the decision before the Court of Arbitration for Sport.
But should the ban stand and Cobo lose his title, Froome will become Britain's first Grand Tour winner, 10 months before then Team Sky team-mate Wiggins won the Tour de France in 2012.
A spokesperson for La Vuelta told Press Association Sport that organisers are awaiting the full decision from the UCI before making any statement.