Rangers fans must have been biting their nails when Sttugart came from behind to win 3-2 with a late goal in a key Champions League qualifier.
If Rangers had won then they would have secured a place in the knock-out stages of the competition.
But now they need a draw in their next match against Lyon on 12 December to get through.
Manchester United, who beat Sporting Lisbon 2-1, and Arsenal, who lost to Sevilla 3-1, have already qualified.
Rangers manager Walter Smith said he was disappointed with the match: "First, we gave away the lead and then after equalising at 2-2 we gave away a point."
A match official shows Arsene Wenger the way off the pitch
Arsenal's loss is the first this season and Arsene Wenger's side missed the chance to claim top spot in their group.
And the coach was sent out of the dug-out during the match for arguing with the officials.
Manchester United's Cristiano Ronaldo's late strike made sure they finish top of their Champions League group.
Ronaldo fired in a superb injury-time free-kick to sink battling Sporting and take the pressure off United for their final group game away to AS Roma.