Atletico Madrid drew 1-1 at Athletic Bilbao on Sunday on their return to action after La Liga's three-month hiatus due to the COVID-19 pandemic, missing out on the chance to capitalise on slip-ups by their rivals for Champions League places.
Iker Muniain gave Athletic the lead in an empty San Mames stadium by prodding home in the 37th minute to complete a clever move but Atletico responded two minutes later when Diego Costa slotted in following a through ball from Koke.
Costa celebrated his goal by holding up the shirt of Atletico Madrid Femenino midfielder Virginia Torrecilla, who had a successful operation to remove a brain tumour in May.
"We're not in the worst situation as this was our first game back and Athletic are a difficult side but we cannot afford to slip up again if we want to get into the Champions League," said Atletico midfielder Koke.
"It's strange to come to a place like San Mames which is usually spectacular and which lives for football and to have no fans but we hope we can get back to normality soon."
This was Atletico's first game since their momentous 3-2 win over Champions League holders Liverpool and coach Diego Simeone decided to deploy Marcos Llorente, who scored twice against the English side and is usually a holding midfielder, in attack just behind Costa.
Yannick Carrasco caused the home team problems in the first half and came within inches of scoring the first goal, flashing a shot wide of the far post after being played in by Llorente.
Carrasco fired wide again before Athletic came to life and Atletico goalkeeper Jan Oblak was forced to keep out headers from Inaki Williams and Yeray Alvarez before Muniain found a way past the Slovenian.
But Atletico have a habit of scoring soon after conceding and Costa made no mistake when played in by Koke.
Atletico had the best chance to win the game after the interval when Athletic goalkeeper Unai Simon parried a cross from Renan Lodi into the path of Santiago Arias but the keeper recovered to block the rebound with his leg.