The teenager has agreed a four-year deal with Brighton after snubbing a new deal at Arsenal. The Gunners were in discussions with Cozier-Duberry regarding a new contract after signing his first professional deal in 2022.
But a failure to agree a contract left the youngster free to join a new club this summer. Newcastle United were understood to be one of several clubs to have submitted a proposal for Cozier-Duberry before he accepted Brighton’s offer.
Arsenal offering Cozier-Duberry a new contract entitles them to a compensation fee from Brighton as the player is under the age of 24.
A club statement issued by Brighton read: “We’re delighted to confirm the signing of Amario Cozier-Duberry on a contract until 2028.
“The attacking wide midfielder joined Arsenal’s academy in September 2019 and signed his first professional contract with the Gunners two years ago.
“He scored 13 goals and contributed five assists in 24 appearances for Arsenal’s under-21s last season and was an unused substitute in two first-team matches against Brentford in the Carabao Cup and Sevilla in the Champions League.