Alexander Isak could take the 'nuclear option' this summer if Newcastle United refuse to sanction a transfer to Liverpool, according to reports.

No formal contact has been made between Newcastle and Liverpool, who saw an earlier informal approach for Isak swiftly rebuffed and pivoted to sign Hugo Ekitiké from Eintracht Frankfurt. The Reds are prepared to lodge a record-breaking bid if Newcastle indicate any willingness to get a deal done.