Juan Mata says David de Gea is happy at Manchester United.

Mata is close friends with De Gea, and the duo are expected to feature in tonight's Champions League showdown with Barcelona at the Nou Camp.

De Gea goes into the match with speculation arising over his future, however, with the Spain international yet to sign a contract extension at Old Trafford.

“David is an extraordinary player," Mata told Mundo Deportivo of his compatriot.

“He gives you points and stops the game changing in a matter of seconds.

“There are not many like him, rather they are scarce.

“He's talked about his future for a long time but he still has a contract. He is quiet, centred.

“I see him well and happy."