Southampton have signed England Under-21 centre-back Taylor Harwood-Bellis on a season-long loan deal from Premier League champions Manchester City.
The move contains an obligation to buy if Saints win promotion from the Championship this season, in a deal which would be worth about £20m.
Harwood-Bellis, 21, spent last season with Burnley, making 35 appearances and helping them up to the top flight.
He then helped England win the European Under-21 Championship this summer.
"I can't wait to get going," Harwood-Bellis told the club Saints website.
"I want to win, I obviously had a taste of that this summer, but my aspiration is to become a better footballer as well, and I feel like I can do that along the way and learn different styles and different ways to play football and I feel like the manager, the staff and the team here can help me do that.