Mourinho worked with Ozil at Real Madrid.
"He is unique. There is no copy of him â€” not even a bad one. He is the best No 10 in the world. Everyone loves him and sees a bit of Luis Figo and Zinedine Zidane in him," said Mourinho.
Ozil's father, Mustafa, has no doubt Gooners will be impressed by his son's total commitment.
"He believes in working hard," said Mustafa. "He is happy to drop deep to get the ball, so much so that he runs between 12 and 14 miles virtually every game.
"He collects the ball from deep positions and distributes from behind to the front.
"That is what set him aside from Messi in Spain. While Messi expects his Barcelona team-mates to do the work for him, Mesut is happy to cover the ground. He expends a lot of energy every time."
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