Crystal Palace have signed midfielder Cheick Doucoure from French side Lens in a £21m deal.
Doucoure has moved to Selhurst Park on a five-year contract, subject to international clearance.
Palace will pay Lens an initial £18m, which could potentially rise to £21m with add-ons.
The Mali international is Palace's third signing of the summer, following the arrivals of winger Malcolm Ebiowei and goalkeeper Sam Johnstone.
Doucoure made 34 Ligue 1 appearances for Lens last season as they achieved a seventh-placed finish in France's top-flight.
"I'm very happy, I feel a lot of joy and a lot of pride to be a Palace player," Doucoure told club media. "I'm proud to be at Palace today."
Palace chairman Steve Parish added: "Cheick's arrival is yet another statement of intent, demonstrating our ambition to further improve the squad this summer.