Tottenham centre-back Cameron Carter-Vickers has joined Sheffield United on a season-long loan.
United have been in the market for another centre-back all summer, with several bids being knocked back for Blackburn's Darragh Lenihan, but they have now landed a Spurs academy graduate instead.
Boss Chris Wilder said: "Cameron is young, athletic and highly rated by Tottenham and we're delighted we've been trusted to continue his development.
"He is a central defender with a good attitude and adds competition for places in that area. I like the way Tottenham play and it's clear that Cameron has the ability to be a very good player."
Wilder has been playing with a back-three this season - the same as Mauricio Pochettino - and Bramall Lane is seen as an encouraging place for Carter-Vickers to gain good experience.
Spurs have also been improving their own defence this summer, and recently signed Ajax centre-back Davinson Sanchez in a club-record £38.4m deal, and they are also back in talks for Foyth - an Argentina youth international who shone at the U20 World Cup.
Carter-Vickers has made four appearances in cup competitions for Tottenham and found life difficult against some of Europe's top sides in the International Champions Cup in the USA in pre-season.