The referee has been appointed for Newcastle United’s Premier League clash with Manchester City on Saturday. The Magpies are preparing to welcome the Premier League champions to St James’ Park at the weekend, after their midweek Carabao Cup clash with Wimbledon was postponed. Newcastle United can now focus all their attention on the game against Pep Guardiola’s side, where Manchester City will be without Rodri due to injury. He could be out for the rest of the season with a knee problem. Elsewhere, Kevin de Bruyne is a doubt for Manchester City, while Newcastle United appear to have no fresh i…