Yusuf Demir has quickly impressed Barcelona coach Ronald Koeman and his staff in preseason training.

The on-loan Rapid Vienna striker joined Barca last week and has been part of senior preseason so far at La Masia.

Mundo Deportivo says Demir's impact in his first days with Barca has surprised and impressed coaching staff.

The 18 year-old is expected to be registered with Barca B, but his form could lead to Demir be promoted to Koeman's first team squad.

The Austria international's loan fee has cost Barca €500,0000 - with a €10m permanent option.