Royal Antwerp sporting director Marc Overmars has been admitted to hospital after suffering what his club called "a mild stroke".
Overmars joined Royal Antwerp earlier this year following a decade as director of football affairs at Ajax.
"Marc is doing well in the meantime, but will have to take it easy for a while," an Antwerp statement said.
It added that the Dutchman and his family would "focus on his recovery".
As a player Overmars won three league titles and the Champions League with Ajax before moving to Arsenal in 1997, where he won a league and cup double before signing for Barcelona in 2000.