Manchester United are interested in re-signing £25m-rated Burnley defender Michael Keane.
The 24-year-old was sold to the Clarets for £2m in 2015 by then-United manager Louis van Gaal.
He made his England debut on 22 March this year and is shortlisted for the Professional Footballers' Association young player of the year award.
Any deal for Keane would allow United to activate a 25% sell-on clause from the player's initial transfer.
If the transfer did go through, it would be the second summer in succession that United would have bought back one of their former academy players following Paul Pogba's world-record £89m return in 2016.