"I reckon it can now officially be described as a very good run by the team in general and still no opponent has managed to score against a Tuchel Chelsea side as yet," Pat Nevin wrote in his column for the official Chelsea website.
"A number of things have become apparent already in these first three weeks, and top among them is the manager’s willingness to change things quickly when they aren’t working as well as he would like.
"I thought the tactical move at half-time in the FA Cup game against Barnsley told us a lot. He had hoped one system would work, it didn’t, okay change that right away.
"Even if it meant the possibility of upsetting a few important players, that was clearly secondary. Winning is the most important thing and if you have to be ruthless in the moment, then so be it."
In the second half of the Barnsley game, Thomas Tuchel tested a formation with four defenders for the first time during his Chelsea spell. It proved to be effective on the night, with the Blues scoring the game's only goal in the 64th minute.
