The 21 year-old is stepping in for the injured Artur Boruc.
"Of course we are going to miss Artur, he is a great goalkeeper, but we have complete trust in the whole squad, not just Paulo Gazzaniga," Pochettino told the club's website.
"It will depend on his convalescing and recuperation for how long he is out for and we do not know exactly how long that will be."
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