Emery may deflect title talk, but his body of work at Villa and the Midas touch he displays – match-winner Watkins described his manager as a “tactical genius” – means they are now right at the heart of the conversation at the top of the table.
Villa’s acid test may just come in their next game, when they face league leaders Arsenal at Emirates Stadium on Tuesday, 30 December (20:15 GMT) but Emery has made a habit of making life difficult for his former club.
He ticks every box for an elite manager, taking Villa into the Champions League last season, only missing out on this term’s competition on the final day of the last campaign, and now taking them just three points from the top of the table and only a point behind Manchester City.
Another figure of significance is that Villa’s win means they are now 10 points clear of fifth-placed Chelsea, a position they would have accepted with gratitude after failing to win any of their first five league games.
Emery proved his pedigree when he acted to galvanise a stuttering Villa display just before the hour as they trailed to Joao Pedro’s messy 37th-minute goal, the striker touching home Reece James’ corner in a scramble.
With Villa going nowhere but the game still in the balance, Emery sent on Watkins, Amadou Onana and Jadon Sancho for Donyell Malen, John McGinn and Emiliano Buendia.
The impact was stunning, Watkins equalising inside four minutes then powering home a header for the winner.
Emery did what the best managers do – he took the big decisions that turned a game which looked to be getting away from Villa on its head.