In an open letter to United supporters, Ajax chief executive and ex-Red Devils goalkeeper Edwin van der Sar asked them to help the Holland international “dream”.
The 23-year-old moved to Old Trafford on Wednesday for £34.1million, which could rise to £38.5m, on an initial five-year deal to become Ole Gunnar Solskjaer’s first new recruit of the summer.
Van de Beek played an important role in Ajax’s thrilling run to last year’s Champions League semi-finals, and also came off the bench as the Eredivisie side lost the 2017 Europa League final to United.
Van der Sar, who spent six years at United before returning to first club Ajax in a backroom role, has now told fans what an exciting prospect their latest signing is.
“Dear Manchester United fans, I hope you’re doing well,” he wrote. “It seems out paths have crossed again.
“One of ours is joining you this season. And like so many players before him, he’s been with us since he was just a little boy.
“Shortly after his debut, he became one of our best. Especially the last couple of years were amazing. From the Europa League final (no hard feelings) to our Champions League run and winning the Dutch Championship.
“The team he was part of showed the world who we are and what Ajax stands for. Like you, we pride ourselves on being one of the best at developing talent and giving young players a shot at the highest level. You could say your new star is the embodiment of that pride.”
Van der Sar signed off by admitting it was difficult for Ajax to let one of their top players leave, but that it was necessary to allow Van de Beek to develop.
“That’s one of the many reasons we don’t like to see him leave, but we understand it’s time for him to move on. To dream on,” his open letter continued.
“And where better to do so than in your theatre. Trust me, I know. Please take good care of our Donny, and help him dream. Enjoy the future.”
Van de Beek completed his move while on international duty, with Holland set for a Nations League double-header against Poland and Italy before then linking up with his new team-mates and he echoed Van der Sar’s sentiments as he spoke following his signing.
“I cannot begin to explain how incredible an opportunity it is to join a club with such an amazing history,” Van de Beek said in an interview with the official Manchester United website.
“I would like to thank everyone at Ajax, I grew up there and I will always have a special bond with the club.
“I am now ready to take the next step in my career and perform at the highest level and there is no higher standard than Manchester United.”