Barcelona's game against Osasuna was postponed shortly before kick-off on Saturday night, following the sudden death of the club’s first-team doctor.
The La Liga leaders made the announcement in a post on social media which read: "FC Barcelona is deeply saddened to announce the passing of first-team doctor Carles Minarro Garcia this evening.
"For this reason, the match between FC Barcelona and CA Osasuna has been postponed to a later date.
"The FC Barcelona board of directors and all staff extend our heartfelt condolences to his family and friends during this difficult time."
The postponement means Atletico Madrid will have the chance to reclaim top spot when they travel to Getafe on Sunday.
Inter Milan recovered from 2-0 down to beat bottom side Monza 3-2 at San Siro and extend their lead at the top of Serie A to four points.
After Lautaro Martinez saw a goal ruled out by VAR, Monza took a shock lead in the 32nd minute through Samuele Birindelli before Keita Balde curled in a fine second.
Inter reduced the deficit through Marko Arnautovic in first-half stoppage time before Hakan Calhanoglu equalised just after the hour mark and the home side completed the comeback via an own goal from Georgios Kyriakopoulos.
City rivals AC Milan also fought back from 2-0 down to win 3-2 at Lecce as Christian Pulisic scored twice in quick succession.
Lecce had been in a commanding position after goals from Nikola Krstovic in each half, but an own goal from Antonino Gallo brought the visitors back into the contest before Pulisic equalised from the penalty spot.
Pulisic then volleyed home the winner eight minutes later to complete the comeback.
Bayern Munich squandered a two-goal lead as they suffered a shock 3-2 defeat at home to lowly Bochum, but Bundesliga title rivals Bayer Leverkusen failed to take advantage as they also lost 2-0 at home to Werder Bremen.
Raphael Guerreiro scored twice in the first 28 minutes, either side of a missed penalty from team-mate Serge Gnabry, as Bayern looked set for a comfortable win before Jakov Medic halved the deficit.
Joao Palhinha was then sent off for a bad tackle on Giorgos Masouras just before half-time and the visitors took full advantage of their extra man as Ibrahima Sissoko headed in a 51st-minute equaliser and Matus Bero scored the winner 20 minutes from time.
Bayern remain eight points clear of Leverkusen after their defeat to Werder Bremen, the visitors ending their five-game losing streak in style courtesy of goals from Romano Schmid and Justin Njinmah.
Borussia Dortmund also suffered a home defeat to mid-table rivals Augsburg after Jeffrey Gouweleeuw scored the only goal of the game midway through the first half.
Stuttgart overcame the dismissal of Leonidas Stergiou to secure a 2-2 draw at Holstein Kiel, while Wolfsburg and St Pauli drew 1-1.
Substitute Ousmane Dembele scored twice in stoppage time as Paris Saint-Germain continued their stroll to a fourth straight Ligue 1 title with a 4-1 win at Rennes.
The victory took Luis Enrique's side 16 points clear of second-placed Marseille, who suffered a shock 1-0 defeat at home to Lens as Neil El Aynaoui fired home the winner in the fourth minute of stoppage time.
