Barcelona and Atletico Madrid rejoined La Liga's top four on Sunday after Barca needed a late penalty to beat Elche 2-1 before Atletico defeated Real Betis 3-1, Joao Felix scoring twice at the Benito Villamarin.
It is the first time Barcelona and Atletico have both been in La Liga's Champions League qualification spots since August.
Atletico have struggled for solidity and consistency since winning the title last season while Barca are still recovering from a financial crisis and the departure of Lionel Messi.
Yet both teams will be growing in confidence that they can now achieve their minimum objective, which is to avoid missing out on the Champions League next season and the further financial damage that would cause.
Barca are now third, level on points with Atletico in fourth, but having played a game fewer. They might both fancy their chances of finishing second, with stuttering Sevilla only seven points in front.
Atletico's win over Betis was particularly significant given Betis started the day in third and have looked the mostly likely candidates to upset the established top four.
Felix, who was again preferred to Luis Suarez, has four goals in his last four games.
"Everyone needs time. We ask everything from Joao and he is doing it," Diego Simeone said.
Barcelona, meanwhile, had to come from behind at the Martinez Valero after Fidel capitalised on a Pedri error, only for Barca to come storming back thanks to two substitutes.
Ferran Torres diverted in from close range on the hour before Memphis Depay scored an 84th-minute penalty after the striker had drawn Elche's Antonio Barragan into a handball.
"It seemed we were going to lose a game we did not deserve to lose," said Barca coach Xavi Hernandez. "We deserved to win by more than one goal."
Victory continues an impressive run of form for Xavi's side, who have not lost in the league since December and came into this game on the back of scoring four times in three consecutive games for the first time since 2017.
When Xavi was appointed in November, Barcelona sat ninth.
"We have four wins in a row, this has not happened for a long time, it's a good sign," said Xavi. "The players believe in what we are doing. We are on the right path."
Barcelona had the better of the chances in the first half, the best of them falling to Frenkie de Jong, who darted in behind but failed to beat Edgar Badia.
Then Ousmane Dembele sprinted clear and his lifted shot was parried out to De Jong, whose follow-up was cleared off the line by Diego Gonzalez.
Elche then landed a sucker-punch a minute before half-time as Barca failed to deal with a straight-forward goal-kick downfield and amid the confusion, Pedri poked the ball back, past his own defence and through to Fidel. Fidel took a touch and fired into the far corner.
Barcelona equalised on the hour as Dembele drove to the line and hung up a cross. Jordi Alba was unable to catch the ball cleanly but Torres was perfectly placed to steer in.
Elche were tiring, Barca pushing for a winner and in the 82nd minute they got their chance as Depay wriggled around Barragan, the ball popped up and Barragan instinctively lifted his arm to meet it. Depay swept the penalty into the top corner.
Atletico were ahead after 75 seconds in Seville as Jan Oblak's punt downfield was flicked onto Angel Correa, who took advantage of some lethargic Betis defending to cross to Felix, the striker given an easy finish.
Betislevelled in the fifth minute of injury-time at the end of the first half after Hector Herrera was robbed of the ball under pressure from Youssouf Sabaly and CristianTello guided the loose ball brilliantly into the corner.
Felix struck again on the hour when Marcos Llorente raced in behind and picked out the Portuguese with a cut-back before Thomas Lemar added a third with 10 minutes left, sidefooting in after an electric Antoine Griezmann run down the right to secure victory.
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