Chelsea defender Gary Cahill was treated in hospital this week for gastroenteritis and could miss Saturday's FA Cup semi-final with Tottenham, boss Antonio Conte says.
Reports on Friday said the England international spent two nights in hospital with a "mystery" illness.
"He arrived on the training ground with a bit of fever and our doctor preferred to take him hospital to check his condition," added Conte.
"Now he's getting better."
Gastroenteritis is a common condition that causes diarrhoea and vomiting.
Cahill has played in all 32 games to help Chelsea establish a four-point lead at the top of the Premier League with six games remaining.