Chevallier, a 53-year-old Frenchman and former professional cyclist, had been with the body since 2000, a period of both rising popularity and huge controversy for the sport.

A member of the Renault-Elf and La Vie Claire teams, Chevallier completed the Tour de France on two occasions, finishing 47th in 1983 and 57th in 1985.

The 1983 race was won by his team-mate and compatriot, the late Laurent Fignon, with Chevallier taking the ninth stage from the wine country of Bordeaux to Pau.

Reasons for his departure could not be ascertained.

The UCI said it did not usually communicate on staff leaving the organisation.

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