Manchester United reportedly have plans to increase security around Ed Woodward's house throughout deadline day.
At the beginning of the year, the chief executive's house was targeted by supporters frustrated with the club's activity in the transfer market.
Flares and smoke bombs were used ahead of United eventually finalising a big-money deal for Sporting Lisbon midfielder Bruno Fernandes.
According to The Mirror, stronger measures will be in place on Monday as United continue their efforts to sign new players.
As it stands, United have only brought in Donny van de Beek from Ajax.