When it rains it pours and Pep Guardiola must be feeling quite blue this morning after potentially losing yet another player to injury. Manchester City have a massive match-up as they return to action on Sunday against Arsenal. A game that could determine the Premier League title race. Pep Guardiola will already be sweating on the fitness of Kevin De Bruyne, Ederson and Jack Grealish, who all had fitness issues before the international break. But now the Blues boss has to worry about four more players who have picked up knocks on international duty and could be doubts to face the Gunners. Man …