Whilst the club is hoping the striker will miss only two or three weeks, the manager immediately pointed to a depressing long term scenario,
As is the case with all such injuries Diafra will be scanned and Allardyce pointed out that the hoped for two to three weeks could be longer if the problem proves serious.
He said: “If it is a grade one off the scan, then it could be two to three weeks, if it is more, then you would be lucky to see him again this season, which is a massive blow but we have to deal with it.
The Hammers are already without Andy Carroll, while there are also suggestions Enner Valencia was carrying a knock when he was substituted for Morgan Amalfitano.
On the latebn goal which deprived the team of a much needed three points, the manager said: “We cant find the right key elements to see the game out and leave ourselves on a nervous edge by having a little bit of panic in what we are trying to do which is coping with the opposition when they have to take more risks, playing more direct.”