Manchester United have completed the signing of Argentina defender Lisandro Martinez from Ajax in a deal worth up to 67m euros (£57m).
He joins the club on a five-year contract which keeps him at Old Trafford until 2027, with the option of a further year.
"It's an honour to join this great football club," Martinez said.
"I've worked so hard to get to this moment and, now that I'm here, I'm going to push myself even further."
Martinez made 120 appearances for Ajax after moving from Argentinian side Defensa y Justicia for £6.3m in 2019, and also played for Newell's Old Boys.