Manchester United's bid for Barcelona midfielder Frenkie de Jong could be hijacked by their Premier League rivals Chelsea.
The Red Devils are in advanced negotiations with the Dutch international but they are yet to agree on a fee for his services.
Chelsea are on standby to swoop in for the midfielder if United fail to push a deal over the line.
De Jong would be a valuable addition to either squad, having played 140 times for Barcelona since joining from Ajax, scoring 13 times in his three seasons.