Match ends, Atlético de Madrid 0, Chelsea 0.
Chelsea produced a battling defensive display to frustrate Atletico Madrid and leave their Champions League semi-final tie evenly poised ahead of next week's return leg at Stamford Bridge.
The Blues lost Petr Cech to a shoulder injury that ended the keeper's season.
But replacement Mark Schwarzer only had one serious save to make, the 41-year-old veteran denying Mario Suarez.
Chelsea's best chance fell to Ramires, but the midfielder fired well wide in a hard-fought tie of few chances.
As well as Cech, Jose Mourinho's side also lost captain John Terry to a foot injury which will force the defender to miss the rest of the domestic campaign, although he could still feature in the Champions League final on 24 May should Chelsea get there.
News of their injuries overshadowed what was a job well done as far as Mourinho was concerned, with the Chelsea manager's defensive tactics paying off as Atletico failed to score for the first time in 11 games in this season's competition.
Yet the evening could not have started worse for the Premier League club in the Spanish capital as Czech Republic international Cech ended up in a heap after colliding with Raul Garcia while keeping out a 17th minute corner.
Los Rojiblancos had netted 22 times in their previous 10 games, but the Blues overcame Cech's loss to produce a stubborn defensive performance which gives them every chance of making their third Champions League final in seven seasons.
Substitute keeper Schwarzer had been guilty of gifting one of the goals as Chelsea's Premier League title hopes faded with a shock 2-1 home defeat by Sunderland last Saturday.
But the veteran, making only his second appearance in the competition, was key as Mourinho's side secured their first clean sheet on continental soil since October.
The Australian's full-length dive to keep out Suarez's powerful shot in the 34th minute was his finest moment.
While Terry, before his injury, and Gary Cahill dealt comfortably with Atletico's danger man Diego Costa, chances were few and far between for the visitors.
Ramires shot wastefully wide after a rare powerful surge into the Spanish half, while lone striker Fernando Torres was so isolated that he was unable to hurt his former club.
Terry's night was cut short in the 73rd minute after colliding with team-mate David Luiz.
Atletico finished strongly, Schwarzer keeping out Gabi's free-kick, while substitute Arda Turan spurned a glorious chance to earn his side a lead to take to Stamford Bridge when he headed wide from close range.
John Mikel Obi will miss the return leg, as will Gabi, after both received cautions for a late skirmish. Frank Lampard was also booked and will not play next week.
The 35-year-old midfielder will hope he has not featured in his last match in this season's Champions League.
- 20Torres Belén
- 3Filipe Luís
- 4SuárezSubstituted forSosaat 80'minutes
- 23MirandaBooked at 89mins
- 14Fernández ArenasBooked at 75mins
- 19Diego Costa
- 8Garcia EscuderoSubstituted forVillaat 86'minutes
- 26Ribas da CunhaSubstituted forTuranat 60'minutes
- 5Cardoso Mendes
- 1CechSubstituted forSchwarzerat 18'minutes
- 12MikelBooked at 75mins
- 26TerrySubstituted forSchürrleat 73'minutes
- 4David Luiz
- 8LampardBooked at 64mins
- 7Santos do Nascimento
- 22WillianSubstituted forBaat 90+4'minutesBooked at 90mins
- 16Van Ginkel
- Jonas Eriksson
- Shots on Target
Second Half ends, Atlético de Madrid 0, Chelsea 0.
Corner, Chelsea. Conceded by Juanfran.
Demba Ba (Chelsea) is shown the yellow card.
Substitution, Chelsea. Demba Ba replaces Willian.
Attempt missed. Diego Costa (Atlético de Madrid) left footed shot from outside the box is too high. Assisted by David Villa.
Attempt missed. Arda Turan (Atlético de Madrid) right footed shot from outside the box is high and wide to the right. Assisted by Koke.
Filipe Luis (Atlético de Madrid) wins a free kick on the left wing.
Foul by Ramires (Chelsea).
Attempt saved. Diego Costa (Atlético de Madrid) header from the centre of the box is saved in the top left corner. Assisted by Gabi.
Offside, Atlético de Madrid. José Sosa tries a through ball, but David Villa is caught offside.
Attempt missed. David Luiz (Chelsea) right footed shot from outside the box is close, but misses the top left corner from a direct free kick.
Miranda (Atlético de Madrid) is shown the yellow card for a bad foul.
Foul by Miranda (Atlético de Madrid).
Fernando Torres (Chelsea) wins a free kick in the attacking half.
Attempt blocked. Koke (Atlético de Madrid) right footed shot from outside the box is blocked. Assisted by Filipe Luis.
Attempt blocked. Diego Costa (Atlético de Madrid) header from very close range is blocked. Assisted by Juanfran with a cross.
Attempt missed. Gabi (Atlético de Madrid) right footed shot from outside the box misses to the left. Assisted by Koke.
Substitution, Atlético de Madrid. David Villa replaces Raúl García.
Attempt missed. Raúl García (Atlético de Madrid) header from the left side of the box is just a bit too high. Assisted by José Sosa with a cross.