The shoulder injury suffered by Poland's Kamil Glik will most likely exclude the defender from the squad for the World Cup in Russia as it would take at least six weeks until he is ready to restart training, Poland’s team doctor said on Tuesday.

“In my opinion, the situation is bad... Even if the treatment is non-surgical, return to full training will take at least about six weeks," Jacek Jaroszewski said in a news conference.

Team officials put off the decision on Glik's place in the squad until Thursday, when doctors from his club AS Monaco will decide on the treatment.

World Cup rules allow the final squad to be named 24 hours before the first game starts.