As Switzerland captain, Stephan Lichtsteiner has worked at close quarters with Granit Xhaka for years - and knows exactly how much potential he has.
Xhaka extended his stay in north London by signing a new contract on Wednesday, and his new club team-mate feels he is only going to get better.
"I’ve known Granit now for more than six or seven years, so he’s just an amazing player," Lichtsteiner told Arsenal Player.
"He’s very good and he’s still young. It’s not easy for him to be the direct leader at 23 or 24 years old, so I hope I can help him to become bigger and bigger.
"He had a very good season and I hope next year he will do even better.
"Off the pitch he is just a great person, a great character, very calm, he knows when he can joke and he knows when to concentrate. A top professional player on the pitch, great passing and just a great player."