Mourinho returns to management for the 1st time since being sacked by Manchester United.
"In Jose we have one of the most successful managers in football", Mr Levy said. He has won honours at every club he has coached.
"I look to our history and you see that the academy is always giving talents the first team need. Working with these players is what has attracted me", said Mourinho. Pochettino, 47, joined Spurs in 2014.
He has also coached Italian side Inter Milan, who he led to a league, cup and Champions League treble, and Spanish giants Real Madrid, with whom he won a league title. Of course, I'm not going to say names, I'm not going to tell you individuals because this is completely against my concept of what a team has to be, but I like a lot the ability of the squad.
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All of the witnesses testifying have already spoken to investigators in closed depositions, some of them for 10 hours or more. Morrison said this irregular channel differed from the "normal process" that the USA government uses for foreign policy.
Mourinho, who has most recently been working as a pundit for Sky Sports, had turned down a number of opportunities to coach overseas since leaving United, including with clubs in China, Spain and Portugal.
On paper, Mourinho's appointment at Spurs appears a mismatch as they are traditionally a club that plays an attacking style of football and promotes young players. Tottenham have not had the best start to the season but did manage to reach the Champions League final last season.
"We were extremely reluctant to make this change and it is not a decision the Board has taken lightly, nor in haste", said Spurs chairman Daniel Levy.
The 56-year-old is no stranger to London having spent over five years at Stamford Bridge in charge of Chelsea where he won the domestic title three times across two separate stints.