In the 78th minute, the 36-year-old was substituted by Gavi, and it was clear that something wasn't right. Thankfully, Raphinha's last-minute penalty secured the win, keeping Barcelona's lead at the top of La Liga at a healthy six points.
Lewandowski, who's been on fire with 40 goals in 48 games, will now undergo an MRI to determine the extent of his injury.
After the match, coach Hansi Flick was tight-lipped about Lewandowski's future. 'He'll have an MRI tomorrow,' Flick said. 'We'll know more after that.'