West Ham have completed the signing of Toulouse defender Issa Diop for a club record £22m.
Diop, 21, becomes new West Ham boss Manuel Pellegrini’s second summer signing after the free transfer of English defender Ryan Fredericks from Fulham on a four-year deal.
“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,” said Diop, who has signed a five-year contract.
“I hope to help the team win lots of games. I am very happy to sign for such a historic, English club, and I hope to show my best here.”
“Issa is a player with fantastic potential who has already shown great quality at such a young age,” said West Ham director of football Mario Husillos.
“We believe he is now ready to make the next step in his career by moving to the Premier League.”
He made his Ligue 1 debut for Toulouse, his hometown club, in November 2015 – a 2-0 win over Nice – before scoring his first goal in a 3-0 victory at Troyes in his second French top-flight appearance.
Diop made 34 Ligue 1 appearances last season as Toulouse struggled, only avoiding relegation with a 4-0 play-off win over Ajaccio in May.