Switzerland coach Murat Yakin admits he's a fan of Barcelona midfielder Gavi.
The 17 year-old has impressed for Spain in their post season internationals.
Ahead of their Nations League clash, Yakin said: "It is incredible that at that age he is able to handle the concepts of the game like that, assimilate so many things at only 17 years old.
"Hopefully we'll be able to find a way for him not to hurt us.
"But it's impressive, he's 17 years old!"