Atletico Madrid were denied the opportunity to restore their 10-point lead at the LaLiga summit after Facundo Ferreyra's 89th-minute equaliser sealed an unlikely 2-2 draw for Celta Vigo on Monday.
Wins for Real Madrid and Barcelona over the weekend put the pressure on Diego Simeone's men, who lost Thomas Lemar and Hector Herrera shortly before kick-off after positive COVID-19 tests were confirmed.
They started poorly at the Wanda Metropolitano and slipped behind to Santi Mina's third top-flight goal of the season, but Luis Suarez levelled matters in the 45th minute with a simple finish at the back post.
The former Barcelona striker repeated the trick five minutes after the interval, but Los Rojiblancos were denied a ninth consecutive top-flight win when Ferreyra - a debutant from the bench - scrambled in from close range late on.