Spanish champions Real Madrid have passed their best wishes on to Barcelona coach Tito Vilanova.
While there has been no official confirmation from Barca, 44-year-old Vilanova is believed to have suffered a relapse after he had a tumour removed last year.
"Real Madrid want to express their support, love and affection to Barcelona coach Tito Vilanova and hope that he makes quickest recovery," read a statement on the club's official website.
"Real Madrid extend this support to your club and your family."
Barca are expected to release their own statement later today.