The Belgium captain Vincent Kompany is a doubt to face the United States in their football World Cup last-16 clash but a scare over Marouane Fellaini is "nothing serious", according to coach Marc Wilmots.
Manchester City's Kompany missed training at the Belgian base camp in Mogi das Cruzes, while Arsenal's Thomas Vermaelen went through a light work-out alone.
Fellaini also left shortly before the end of training with what looked like an ice-pack on his left calf.
But Wilmots says the move was precautionary and that the Manchester United player should be "100 per cent" for Wednesday's game in Salvador.
He has greater concerns over centre-backs Kompany and Vermaelen, with both struggling to be fit for the elimination game against Jurgen Klinsmann's Americans.
Injuries have haunted Wilmots' squad, especially in defence, with right-back Anthony Vanden Borre ruled out after fracturing his fibula in the 1-0 win against South Korea.