The Tour de France could be withdrawn from UCI's schedule next year, according to reports.
The governing body is in a dispute with Tour organisers Amaury Sport Organisation due to a lack of progress in its reform programme, claims Reuters.
A source said that ASO sent a letter to UCI threatening to withdraw from the 2016 calendar if reforms do not go ahead but it would not be a threat to the staging of the Tour.
ASO also own the Paris-Roubaix, Liege-Bastogne-Liege, Paris-Nice and the Criterium du Dauphine.