Arsenal have confirmed the signing of Leandro Trossard from Brighton on a long term contract.

Trossard emerged as a transfer target for the Premier League leaders after the Belgian demanded an exit from the AMEX. The two clubs quickly agreed a deal worth around £27m and he will now aid Arsenal as they seek a first league title since 2003/04.

Arsenal add they are "hoping" Trossard will be available to face Manchester United on Sunday having submitted all relevant documents.