Belgium's captain Vincent Kompany out of World Cup training with groin strain

Belgium's head coach Marc Wilmots gestures to referee after Belgium's Eden Hazard collided with Algeria's Mehdi Mostefa, right, during the group H World Cup soccer match between Belgium and Algeria at the Mineirao Stadium in Belo Horizonte, Brazil, Tuesday, June 17, 2014. (AP Photo/Sergei Grits) (The Associated Press)

Belgium's Vincent Kompany plays with the ball during a training session at the Mineirao Stadium in Belo Horizonte, Brazil, Monday, June 16, 2014. Belgium will play in group H of the Brazil 2014 soccer World Cup. (AP Photo/Bruno Magalhaes) (The Associated Press)

Belgium captain Vincent Kompany missed training on Thursday because of a groin strain, three days ahead of his team's Group H game against Russia at the World Cup.

Kompany stands at the heart of the Belgium defense and missing the Manchester City stalwart would be a big handicap for the group leader.

Coach Marc Wilmots called it a "slight" strain and said Kompany was working on an individual program with the medical staff.

Playmaker Eden Hazard made a return to training and showed no ill effects from a toe contusion sustained in Tuesday 2-1 victory over Algeria.

Belgium can advance to the knockout rounds if it beats Russia on Sunday.