Blackburn Rovers players are upset for goalkeeper Paul Robinson.
Robinson, 30, hobbled off in the 3-1 defeat at former club Tottenham on Saturday with a calf injury.
Tests are still being analysed but early estimates suggest he will be out for four to six weeks.
Rovers defender Chris Samba said: "We're all hoping it's not too bad for Paul.
"It's not just for Blackburn, he has the World Cup coming up."