The Guinean defender, who was taken off against QPR, has found out that he will miss six to eight weeks of action with a thigh problem.
The news will come as a massive blow, especially after his encouraging start at Hillsborough when he finally made his debut at former club Ipswich.
More problems in the treatment room for Wednesday - this time for winger Richie Partridge.
The former Liverpool player has hurt a hamstring in training and is a doubt for the weekend's clash at Leicester City.
McGovern though has reacted well to light gym work and is set to step up training this week.
The Scot injured his back during pre-season and it is expected that he will be ready to make a return towards the end of the month after he was given the all clear to start running again but he is yet to do any work with the ball.