Manchester United have been getting 'average performances' for months from David de Gea, according to former Chelsea and Fulham goalkeeper Mark Schwarzer.
The Spaniard has come under scrutiny this season after errors against Crystal Palace and Southampton.
And Schwarzer, speaking to Goal, believes his performances could see United decide to cash in, rather than bow to his demands during ongoing contract negotiations.
David de Gea has produced 'average performances' for six months, believes Mark Schwarzer
Real Madrid, Barcelona and Paris Saint-Germain have been credited with an interest in him should he become available on a free transfer.
With contract negotiations taking place while he makes a number of high-profile mistakes, Schwarzer is not convinced the club will keep him if his value decreases.
'They will have to come to a decision at some point on whether his value is the same as what he is asking for,' he told Goal.
The Spaniard has made a number of high-profile mistakes during United's opening four games
'There's speculation about him and then there's the fact that he may still choose to leave.
'Ultimately there comes the point where your history and your past performances only get you so far. It is about now. If you look at his last six months, his average performances haven't been anywhere near what they have been in the past.
'If you break it down, a lot of goals have come from direct mistakes from De Gea. Probably more than in the entire six or seven-year period before. There is always a balancing act as a player. What's your current value? Your recent performances come into that.'