"We checked Savage out with our doctor and physios who think that if we had a game on Wednesday - or even next Saturday - then he would be struggling to play," said Blues manager Steve Bruce.
"He's going down to Wales to be checked out by their doctors but I think it would be absolutely ridiculous for him to make an eight-hour flight given the kind of injury he has got."
"After all the carry-on we have had with this particular issue, I want to stress that the injury is genuine. There is no way that I would take Robbie off with 15 minutes to go if his legs were okay.
"He is very sore and you can see he was limping around the pitch so I had no alternative but Wales are quite welcome to inspect him themselves."
Wales' manager Mark Hughes had been involved in a bitter battle with Blues in a bid to prevent Savage from playing by trying to invoke the FIFA four-day rule and only a last-ditch appeal to FIFA delayed Savage's departure to join the Wales squad long enough for him to turn out against Fulham at St Andrews on Sunday.
FULHAM MATCH REPORT
If you would like the top stories on Singing The Blues to be emailed to you for FREE on a weekly or daily basis CLICK HERE