"You could feel that when he came off we were all very much anxious", coach Roberto Martinez told a news conference, adding that it would probably take 48 hours to determine how serious the injury was. "He said he felt discomfort in his groin when he walked off the pitch".
Martinez also confirmed that Kompany will be given until the last possible moment to prove his fitness ahead of Belgium's first World Cup fixture against Panama on June 18.
"Until 24 hours before the Panama game we can still make a replacement".
"We need to wait a period of seven, eight days with Kompany".
The pair play on the left and right of the back three respectively with Vincent Kompany between them, although Kompany had to come off injured last night and was replaced by Dedryck Boyata. "Until then, we're going to give the maximum time to see what the reaction is with Vinny", Martinez, whose team also face England and Tunisia in the group stage, told a news conference at the national team's training centre in Tubize. "His leadership is essential for us".