By Grey Whitebloom Premier League rivals Manchester United and Arsenal are both interested in signing Bayern Munich forward Leroy Sane, according to reports in Germany. Sane is very familiar with the demands of England’s top flight after spending four trophy-laden seasons with Manchester City. The German winger didn’t always enjoy the best relationship with Pep Guardiola and missed most of his final campaign at the Etihad with an ACL tear, but still managed to rack up 54 combined goals and assists in 90 Premier League appearances. It has been increasingly difficult for Sane to replicate his fo…