Antoine Griezmann's strike has put Atletico Madrid 1-0 up against Galatasaray and on the brink of the Champions League last 16 in their penultimate Group C match at the Vicente Calderon.
Atletico put the Turkish side under pressure from the first whistle, knowing that victory would assure them of a place in the last 16 and lift them to the top of the group after Benfica were held to a 2-2 draw by Astana earlier on Wednesday.
However, it was the visitors who should have taken the lead against the run of play after 12 minutes when Wesley Sneijder burst through on goal but saw his low drive tipped away by Jan Oblak.
Atletico made their opponents rue that missed opportunity within a minute, as top scorer Griezmann took advantage of a lack of marking to drift into the box and head Gabi's cross past Fernando Muslera.
Muslera held on to a volleyed effort from the French striker as the hosts pushed for a second goal, and with Galatasaray showing few signs of life, Koke fired narrowly wide as the pattern of the first half continued.
Diego Godin headed narrowly over from Gabi's corner and Felipe Luis should have done better when he went for goal instead of squaring the ball, but the game descended into a scrappy affair as the score remained 1-0 at the whistle.