Newcastle United U21 chief Willie Donachie has challenged new signing Olivier Kemen.

The young French midfielder signed for Toon last week.

Donachie has been impressed with Kemen's contributions so far, he told the Evening Chronicle: "He's a midfielder who is very, very strong for his age.

"Olivier turns 17 this month. He's played Under-19s football as an Under-17 where he can play the holding role, or as a box-to-box player.

"I think he's physically very strong, and technically good.

"He's still young, and has a long way to go before he's an established player.

"I don't think a player becomes established until he's 21."