Leeds have rejected a £40m offer from Brentford for teenage midfielder Archie Gray.
The 18-year-old travelled to the Premier League side for a medical on Saturday, but the two clubs have failed to come to an agreement over how the deal would be structured.
Gray was a near ever-present for Leeds last season, playing 52 matches in all competitions - primarily in midfield but occasionally at right-back - and he signed a new long-term deal in January.
The Brentford transfer would have made Gray, an England Under-21 international who also qualifies for Scotland, a record signing for the west Londoners.