Winning a title for a team is a big challenge for any coach. Pochettino has to prove it with the team he coaches, but I'm sure it won't be easy for him. Pochettino is not a coach who has had much success winning titles with the team, but at least he has character for the team and built it. He failed to win the title for Tottenham, but believe me on his day, Manchester City were too good to stop.
Pochettino carried out a tough task at Chelsea when Chelsea was in a very bad situation. Pochettino is expected to be able to restore the team's glory and revive its performance, but it is not an easy task that he can prove in a short time. Chelsea have a good character game with them, but they still fail a lot in winning games. Of course it takes patience and improvement, but Chelsea should be able to get some quality players instead of players with high market value.