Toby Alderweireld was forced off in the second half of Tottenham Hotspur’s 1-1 draw with West Bromwich Albion on Saturday following a collision with Baggies striker Salomon Rondon.
Pochettino is unsure as to the extent of the injury, but hinted that the Belgian will not be available for the midweek tie in Germany.
“With Toby we need to wait 24-48 hours. He got a heavy knock in his leg. We will see what happens, now it is very painful. We need to know the problem,” he told reporters.
“It is very difficult (for him to go to Germany). But we don’t know, we need to assess him tomorrow with a scan or whatever the doctors want to do.
“I don’t know exactly what happened, it was hard for me to see from the bench. All I said was, ‘How are you?’ And he explained he had pain. It is a big area: knee, leg, all.”