Germany coach Joachim Low was furious after a bad tackle on Manchester City midfielder Leroy Sane.
Sane limped off in the final minutes of Die Mannschaft's 1-1 friendly draw with Serbia on Wednesday night.
Serbia debutant Milan Pavkov was shown a straight red card for the challenge high on Sane's ankle, which led to him being substituted moments before the final whistle.
"It was a vicious," Low said after the match.
"Sane was lucky and got away with not getting hurt, but such fouls can break bones."
Sane later stated: "Everything is okay with my ankle joint and I'm quite satisfied with my performance.
"We had a few good moments but we have to deliver more.
"I try to push the team forward. We are looking forward to Sunday."