Belgium captain Vincent Kompany has been forced to sit out training on Thursday with a groin strain.
The Manchester City defender featured during his team's 2-1 victory over Algeria on Tuesday afternoon, but the 28-year-old is a doubt for their next fixture with Russia on Sunday.
National team coach Marc Wilmots tweeted: "No @ VincentKompany at training today, slight strain in the groin. He is working individually with medical staff!"
Belgium will qualify for the last 16 with three points against their group rivals.