VALLON PONT-D'ARC, France (Reuters) - Dutchman Tom Dumoulin (Giant-Alpecin) won the 13th stage of the Tour de France, a 37.5-km individual time trial from Bourg-Saint-Andeol on Friday.

Briton Chris Froome strengthened his overall lead after taking second place, 63 seconds behind Dumoulin, according to provisional results.

(Reporting by Julien Pretot; Editing by Toby Davis)