Dylan Hartley a doubt for England’s key Six Nations match in France

• England captain struggling with muscle tightness• Jack Nowell and Sam Underhill definitely out of Paris matchDylan Hartley is a doubt for England’s crucial Six Nations match with France, while Jack Nowell and Sam Underhill have definitely been ruled out of the trip to Paris.The forwards coach Steve Borthwick has revealed that Hartley is struggling with muscle tightness in his leg, and Nowell and Underhill have been afflicted by respective ankle and toe injuries that they suffered in training. Related: Eddie Jones threatens England changes for likely Paris ‘slogathon’ Related: Stars, drama a…