Arsenal defender Kolo Toure has contracted malaria.
Gunners boss Arsene Wenger has already lost Alex Hleb to Barcelona, Mathieu Flamini to Milan and Gilberto Silva to Panathanaikos.
And his plans to bring in new faces has been interrupted with the news of Toure's illness.
The player was taken to hospital while on the club's mini pre-season tour of Austria and Hungary.