Defending Tour de France champion Chris Froome could face test from Tom Dumoulin on 2018 route

Defending champion Chris Froome can expect a stern challenge from Dutch rider Tom Dumoulin in next year's Tour de France.

Froome is chasing a record-equaling fifth victory to move level with Belgian great Eddy Merckx, French riders Jacques Anquetil and Bernard Hinault, and Spanish great Miguel...