Atletico Madrid face a nerve-wracking final game to ensure they reach the Champions League knockout stage after they could only draw 1-1 at home to a much-changed Bayern Munich side on Tuesday following a late penalty from Thomas Muller.
Atleti looked on course for a comfortable victory which would have sealed a place in the last 16 when Joao Felix put them in front in the 26th minute, appearing at the near post to knock in a cross from Marcos Llorente.
But Diego Simeone's side, playing without Luis Suarez and Diego Costa, were unable to add to their lead against holders Bayern, who rested most of their first-team regulars after qualifying as group winners last week.
A third consecutive draw left Atletico second in Group A with six points and to qualify they must avoid defeat in their final game at RB Salzburg, who are third with four points.
"We played a great game, a good first half, we could have been further ahead than 1-0. I think the team was good until 15-20 minutes into the second half," Simeone said. "They got the penalty and we got a draw that keeps us alive for the game with Salzburg."
Being clinical will come, with calm, and repetition of situations in the box. We improved today in terms of assists in the box. I think we're improving in the box and let's hope we're clinical in the defining moments like next Wednesday."
Simeone made a defensive substitute just before conceding the penalty in removing Angel Correa for Hector Herrera and surprisingly took off scorer Felix and in-form winger Yannick Carrasco right after Mueller converted from the spot.
"We are feeling angry and frustrated because we have drawn because of a penalty and we leave here with an awful taste in our mouths," said Atletico winger Llorente. "Bayern are a great team but we did more than enough to win."
They were not far from re-taking the lead as defender Mario Hermoso narrowly missed the target with a late header while they also came close with a last-ditch corner deep in added time.
Bayern, whose record run of 15 consecutive Champions League victories was halted, top the group with 13 points, while Lokomotiv Moscow, who lost 3-1 at home to Salzburg in the group's early game, are bottom with three.