"Defender Kamil Glik sustained a serious injury during training. We are not sure that he can play against Senegal tomorrow. We'll only see tomorrow," Nawalka told journalists.

The 30-year-old, who has earned 58 Poland caps since 2010, picked up the injury while performing an overhead kick during training.

Poland, who have been drawn in Group H, will play their first 2018 World Cup match against Poland at Moscow's Spartak Stadium on Tuesday.