Ajax fear their £30million-rated striker Luis Suarez could demand a transfer if Martin Jol quits for Fulham this week.
Manchester United are among a number of European clubs interested in the Uruguayan World Cup star.
An Ajax insider told The Sun: "Suarez gets on with the management and if that changed, you don't know the future."
Need your Manchester United news fix? Click here for all United news and transfer rumours.