Jose Mourinho has heaped praise on "humble" Kieran Tierney after Arsenal splashed the cash on the Celtic star.

Chelsea and Real Madrid legend Mourinho hailed the left-back's move to London and described him as somewhat of a throwback defender.

Speaking in his new role on Sky Sports, the Special One said: "Tierney is like a young Nacho Monreal.

READ MORE: Kieran Tierney has the qualities to succeed at Arsenal, says Van Dijk

"He is the same kind of profile. He's reliable, looks a good character, looks a great personality.

"He looks a little like someone from a previous generation in some aspects.

"He has a humble way of behaving and I like his profile."

KT, 22, may not feature for Unai Emery's men for up to six weeks as he continues his recovery from a double hip operation.

But his teammates kicked-off their season with a 1-0 victory over Newcastle at St James' Park.