West Ham have announced the signing of Toulouse defender Issa Diop.
The initial fee of £22m is a current club record, though the add-ons in the deal which brought Marko Arnautovic to the club would see the Austrian remain as the record signing.
“I am very happy to sign for such a historic, English club, and I hope to show my best here," Diop said.
“I am a very ambitious player and West Ham is a very ambitious club, as we've seen with the appointment of the new coach. I hope to help the team win lots of games and make the fans happy."
West Ham's newly appointed director of football, Mario Husillos said: “Issa is a player with fantastic potential who has already shown great quality at such a young age.
“It is a measure of his character and maturity that he was named captain of Toulouse at just 20 years of age, having already established himself in their team as a teenager.
“There were many other big clubs interested in signing Issa and we are delighted that he has chosen to join us. We look forward to hopefully seeing him make a big impact next season."