Geraint Thomas has been forced to abandon the Tour de France following a crash on stage nine, Team Sky have announced.
Welshman Thomas, second in the general classification to team-mate Chris Froome, crashed on the descent of the Col de la Biche – the first of three Hors category climbs on Sunday.
The incident left Thomas with a suspected broken collarbone, according to the official Tour de France website.
"Sadly @GeraintThomas86 has been involved in a crash on this treacherous descent coming off the Col de la Biche," Team Sky posted on their official Twitter account.
"[Thomas] has been forced to abandon #TDF2017 following that crash."
Thomas won the opening stage and wore the yellow jersey for the first four days of the Tour until Froome moved ahead of him in the GC.
It is the second time the Welshman has been forced to withdraw from a Grand Tour this year after he pulled out of the Giro d'Italia following a crash.