ARSENAL have made their first summer signing after snapping-up 16-year-old Estonian wonderkid Karl Jakob Hein.

The teenage goalkeeper joins the Gunners Under-18 side from Nomme United on a free transfer.

1 Arsenal sign Karl Jakob Hein from Nomme United on a free transfer as first summer signing Credit: Facebook/FC Nomme United

He is seen as a star of the future, and will play in the North London club's youth ranks next season.

Hein has already been pictured at Arsenal's London Colney training ground.

The youngster was also being tracked by Manchester United, Southampton and Brighton.

It is understood he has signed a one-year scholar deal, with a three-year professional contract on the cards.

Is Unai Emery going to be the new Arsenal manager?

Meanwhile, Arsenal are on the brink of announcing Unai Emery as their new manager.

The ex-PSG coach will take over from Arsene Wenger, who is leaving the club after 22-years in charge.

It is understood the 46-year-old will be unveiled this week.