Antonio Conte says no manager in the world would be able to deliver a quick fix at Tottenham.
Conte has inherited a squad that is highly inconsistent in both results and performances and in need of major surgery if they are going to get back to the top table of English football.
They beat Manchester City in the Premier League but were then knocked out of the FA Cup by Middlesbrough and Conte says any manager would encounter the same problems.
He said: "Tottenham's story is this, many ups and downs. To be competitive and try to win something and try to fight for something important and to become a strong team, the first thing that has to happen is to be stable and to avoid these ups and downs.
"To do this and to change this type of situation that has been for many, many years is not simple. In a short term it is impossible to do this, not only me but for every manager to come here and change the situation.
"This story of this club for the last 20 years."
Spurs are back in action on Monday night against Everton and they have some positive injury news.
Rodrigo Bentancur and Lucas Moura are available, though Oliver Skipp and Japhet Tanganga remain out.
"Bentancur is available, the same for Lucas Moura. For Skipp and Tanganga they are not available, we have to wait," Conte said.