The Norwich City defender did not train with the rest of his international teammates in Dortmund on Saturday due to a groin strain.
Strachan is expected to name his starting XI before Sunday morning's training session.
"Only a player could tell you how he is feeling," he is quoted as saying by Sky Sports News. "He felt a bit yesterday so we took him off training as a precaution and obviously we have been on the go since the morning."
Brighton & Hove Albion's Gordon Greer is in line to replace Martin if he fails to regain full fitness.