Manchester United have had a bid rising to £50m turned down by Crystal Palace for right-back Aaron Wan-Bissaka, According to Sky Sports News.
It is understood that the offer was worth an initial £35million, with additional payments amounting to £15m.
Crystal Palace are understood to be unhappy with the structure of the proposed deal, but it is believed they would accept £50m up front for the English star.
Although Wan-Bissaka wants a move to Old Trafford, he has not put in a transfer request or agitated for the transfer.
Palace are under no pressure to sell the 21-year-old, who played 39 games in all competitions last campaign as the Eagles finished in 12th place.
Wan-Bissaka still has three years remaining on his deal at Selhurst Park.
United head coach Ole Gunnar Solskjaer is keen to bring in a right-back this summer window following the exit of club captain Antonio Valencia.