Leandro Trossard has completed his €18m move to Besiktas from Premier League champions Arsenal.

The Gunners confirmed on Tuesday that an agreement had been reached between the two sides, with Trossard putting pen to paper on Wednesday.

He has signed a three-year contract, with the option of a further 12 months.

Trossard joined Arsenal from Brighton in January 2023, going on to make 174 appearances in all competitions, scoring 36 goals and assisting 34 times for the Gunners.

He was part of the team that won the Premier League in 2025-26 as well as reaching the Champions League final, though they lost to Paris Saint-Germain on penalties.

Resmi Açıklama | Leandro Trossard

https://t.co/sMLcyGQwzU pic.twitter.com/Y35S5HTKbZ

— Beşiktaş JK (@Besiktas) July 15, 2026

The Belgian, who represented his nation at the World Cup before being knocked out in the quarter-final by Spain, played a key role in their Premier League triumph.

He managed six goals and six assists in 31 league appearances, with only Viktor Gyokeres (15 – 14 goals, one assist) recording more goal involvements for Mikel Arteta's side.

Besiktas have now made seven signings this transfer window as they look to build on a fourth-place finish in the Super Lig last term.