A 90th-minute goal from ex-Barcelona striker Luis Suarez gave Atletico Madrid a 2-1 victory at Alaves as they returned to the top of La Liga.
He had earlier teed up a deflected shot from Marcos Llorente to put Atletico ahead shortly before half-time.
Alaves had Victor Laguardia sent off in the second half but equalised with a Felipe own goal, before Suarez latched on to substitute Joao Felix's cross.
Despite the dismissal of Laguardia, Alaves had a flurry of late chances and levelled in the 84th minute when Felipe diverted a cross from Joselu into his own net.
But Atletico, who last won the title in 2014, snatched the win as Suarez converted his ninth goal of the season.
"We knew it would be a difficult game as Alaves always make things tough and they proved that by drawing level with one player less but it was so important for us to get the win," said goalscorer Llorente.
"Our substitutions worked very well and we got the second goal after a great piece of play and it allows us to keep focusing on our objective."
Having begun 2021 top of the table, they had briefly ceded top spot on Saturday when Real Madrid beat Celta Vigo, they now lead city rivals Real by two points again, with two games in hand.