Unai Emery had to tear up the plan. Aston Villa had started this game in a compact 4-2-2-2 formation but they were desperate for much of the first hour. Their passing was lethargic, they had no width, they were 1-0 down to a dominant Chelsea and it seemed the story was going to centre on Emery’s decision not to start Ollie Watkins up front.

Yet few managers are as effective as Emery when it comes to altering the flow with a few smart tweaks. The Spaniard never stops plotting, never stops hunting for weaknesses in his opponents, and perhaps it was not a surprise when Villa’s tactical mastermind found a way to ensure that the travelling fans were belting out songs about winning the league at full time.