Zlatan Ibrahimovic left Manchester United's Europa League quarterfinal second leg against Anderlecht on Thursday with an injury at the end of regulation.
The veteran United striker landed awkwardly after challenging Kara for a high ball in the 92nd minute of regulation time and went down for treatment when the second half finished. Ibrahimovic subsequently hobbled down the tunnel with the assistance of medical staff and was replaced by Anthony Martial for the additional 30 minutes.
Marcus Rashford eventually scored early in the second period of extra time to give United a 2-1 win at Old Trafford for a 3-2 aggregate victory and a place in the semifinals.
It was the second major blow of the match for United, which had already lost Marcos Rojo to a knee injury that resulted in him being taken off on a stretcher in the first half.
Rojo's issue adds to manager Jose Mourinho's defensive troubles, with Chris Smalling and Phil Jones already ruled out until next month.