Trek-Segafredo says its rider Fabio Felline has fractured his skull and broken his nose in a fall at the start of today’s Amstel Gold Race in the Netherlands.

The race, won by Wanty-Gobert’s Enrico Gasparotto, was still in the neutralised zone when the 26-year-old was involved in what his team described as a “freak solo crash.”

Video posted to Twitter shows the moment the incident happened, with Fellini thrown over his bike’s handlebars, the rider appearing to use his left hand to carry out some kind of adjustment close to the front fork immediately beforehand.

Team doctor Jens Hinder said: “Fabio crashed with his face directly into the ground. He sustained a broken nose and cuts to his face and the radiologists also found a fracture at the base of the skull.

“He needs further examination to determine if it is stable or unstable and this will determine what treatment is required for recovery. It is too early to know until he undergoes further tests.”

The team added that further examinations will be needed to assess the length of time the 26-year-old Italian, who recently returned to racing following a virus, will need to recover from his injuries.