Arsenal teenager Nathan Tella has said he is joining Southampton after a decade at the North London club.
Tella, 17, has signed for the club after playing for the under-18s on trial against Leicester earlier this month.
The winger wrote on his Instagram page: "After a great 10 years at Arsenal, sadly I have to move on to a new challenge.
"Thank you everyone who has helped me over the past 10 years to make into the player I am.
"I will miss the boys and hope they all have a great career.