Manchester United must match Antoine Griezmann's buyout clause if they're to land the Atletico Madrid star.
Sport says Paris St-Germain are ready and willing to activate the forward's £89m release clause this summer.
The Atletico Madrid hitman recently penned a new contract which elevated his release clause to a world-record equalling fee.
The Sun reports United are keen on the Frenchman - but they will have to break the bank to land him.
PSG are determined to replace Zlatan Ibrahimovic who left the French champions for United on a free transfer over the summer.
They went up against the Red Devils for Barcelona's Neymar and were prepared to trigger his release clause before he signed a new deal with the Catalan club.