Warren Gatland admits James Davies adds to Wales selection predicament

• Flanker scores his first try for Wales in defeat of Argentina • Gatland: ‘We are very lucky … I’ve got a little bit of a headache’Deep inside San Juan’s Estadio del Bicentenario the Wales head coach could not help but raise a smile. Warren Gatland had just been asked about his plethora of back-row options leading up to the World Cup next year, barely minutes after watching James Davies produce a man-of-the-match display in his team’s 23-10 victory against Argentina on Saturday night.While England’s search for an out-and-out openside flanker for Japan in 2019 continues – their 42-29 defeat to…