Wales worry over fitness of Dan Biggar after knee injury with Northampton

Wales face nervous wait over fitness of fly-half England welcome Mako Vunipola back into squadWales are holding their breath over the availability of the fly-half Dan Biggar for their Six Nations match at Twickenham on Saturday after his club coach Chris Boyd said they must “wait and see” if he will be fit.Biggar, 30, was released to play for Northampton against Saracens over the weekend but was forced off injured after 20 minutes. Boyd described the knee injury as “not serious” but said it was unclear how long he would be out. Related: No further Six Nations postponements expected after coron…