There was a period here when Chelsea were in danger of being induced to coma by Newcastle, whose best tactic of late is to bore an opponent towards complacency.
The Blues had taken an early lead and were so dominant that cattle from the nearby Town Moor could have wandered into their vacant half and not interfered with play. Indeed, Chelsea goalkeeper Edouard Mendy was left to graze alone for the entirety of the opening half hour.
But entering the final 25 minutes they had allowed the game to drift. It helps, then, when you have a player like Timo Werner to drag you from a slumber.