Manchester City heaped more pressure on Chelsea boss Graham Potter as Riyad Mahrez inspired a 4-0 rout in the FA Cup third round. Premier League champions City rarely suffer such embarrassment and they made the strongest possible start by dismissing abject Chelsea with contemptuous ease at the Etihad Stadium. Graham Potter who has lost half his side due to injuries, must have felt more disgruntled after the away fans chanted Thomas Tuchel's name in the stands. With only UEFA Champions League to play for, Chelsea will hope for a decent showing when they play Fulham next in the EPL.