Tyrell Malacia has signed for Manchester United from Feyenoord in a deal that is reportedly worth up to £15 million.
The Netherlands international becomes the long-awaited first signing of the Erik ten Hag era at Old Trafford, following a slew of exits under the Dutchman.
Malacia will now join up with his countryman at United and is expected to offer competition to England defender Luke Shaw and Brazil's Alex Telles in the left-back role going forward, having signed a four-year contract with an option for a further season.
The 22-year-old was reported to be moving for a £13m (€15.1m) fee, with just shy of £2m in add-ons. Reports in the Netherlands claim Feyenoord will receive a percentage of any future sale, too.
"It's an incredible feeling to have joined Manchester United," Malacia said. "This is a new chapter for me, a new league with new teammates and a tremendous manager leading us.
"I know from playing against his teams in the Eredivisie, the qualities that he has and what he demands of his players.
"Whilst I know that I am still young and will continue to develop, I can promise the United fans that I will leave everything on the pitch every time I pull on the red shirt.
"I'll always be thankful to Feyenoord for all they have given to me and my family.
"None of this would be possible if it wasn't for them. Now I'm ready to focus on the future with United and help my new club achieve success."
Malacia came through the Feyenoord academy, having joined the club as a nine-year-old, and broke into their senior set-up as an 18-year-old in 2017.
He was an unused substitute in their KNVB Beker and Johan Cruyff Shield wins in 2018 and featured in their Europa Conference League final loss to Roma earlier this year.