Real Madrid No2 Aitor Karanka was delighted with Denis Cheryshev's performance in their Copa win over Alcoyano.
The young Russian international is the subject of a €6 million offer from Everton and was handed a full home debut in the 3-0 win.
"Denis played well," said Karanka.
"Cheryshev has had a good evolution. In the two years he has made tremendous progress here. He has matured and is the fastest growing player we have. With his age, his future is fabulous," said Karanka,