Tottenham defender Juan Foyth suffered a serious looking ankle injury in their pre-season friendly with Bayern Munich.
The 21-year-old Argentina international went down unchallenged in the second half clutching his ankle.
He hobbled off the pitch but needed a stretcher to get down the tunnel.
"I need to talk with the doctor," said Spurs boss Mauricio Pochettino. "He twisted his ankle but at the moment I cannot give an update. He said his ankle was very painful."
Foyth is usually a centre-back, but could be needed at right-back with Serge Aurier injured, although Foyth is suspended for the first two games of the Premier League season.
- Tottenham beat Bayern on penalties after a 2-2 draw.