If you speak to those behind the scenes at Tottenham, they will tell you that Roberto de Zerbi's impact has been profound.
Not only in picking up 11 points from seven games to preserve the club's top-flight status, but his growing influence is instilling belief in the squad.
"I think he has made an extraordinary impact so far," Spurs' chief executive Vinai Venkatesham told BBC Sport.
"We have to recognize that it's early days, and we also need to recognize that he's come into a very specific situation.
"It is hard to underestimate the scale of the challenge he walked into. And it's hard to describe what a significant impact he has had in the dressing room with all the players.
"I think he's an excellent coach, and we think that he plays the style of football that our supporters and the broader football public want to see."
De Zerbi is expected to have full involvement in the club's recruitment this summer.
Tottenham have held talks with Borussia Dortmund's departed sporting director Sebastian Kehl, while Venkatesham confirmed the club have raised their wage ceiling in the hope of attracting top-quality players.
"The squad needs work and the squad hasn't got the right balance," he said.
"We need experience and leadership and also that kind of physical robustness to play in the most demanding league that exists.
"We need to strengthen the club over multiple transfer windows but this transfer window, in particular, is going to be critical."