Fulham have signed centre-back Terence Kongolo from Huddersfield on a four-year deal for a reported £4m.
Kongolo, 26, joined the London side on loan in January but suffered a broken foot and returned to the Terriers after making just a single league appearance.
The Dutchman joined Huddersfield from Monaco for a club record £18m fee in 2018 and played 60 games for the club.
Scott Parker's Fulham are bottom of the Premier League, without a point from four games after conceding 11 goals.
Kongolo said: "I am really happy. It has been a while, been waiting the whole day, but the end result is I can play for Fulham. I am proud to be here, and I will give everything for this club."
Meanwhile, Fulham's new Danish defender Joachim Andersen, who joined on loan from Lyon on deadline day, has been ruled out for at least a few weeks with an ankle injury.
Although the transfer window closed on 5 October for Premier League clubs to sign players from abroad, they were allowed to conduct business with Football League teams until 17:00 BST on Friday.
Find all the latest football transfers on our dedicated page.