Barcelona forward Lionel Messi missed the win over Real Sociedad through injury and remains doubtful for the Supercopa de Espana final.
Real Madrid suffered their first loss since December 1 at the hands of Athletic Bilbao, but Zinedine Zidane says they must move on.
Athletic Bilbao will face Real Madrid in the final of the Supercopa de Espana after ending Real Madrid's nine-match unbeaten run.
Atletico Madrid said conditions in the Spanish capital were so difficult that their game against Athletic Bilbao could not go ahead.
Lionel Messi is recapturing his best form for Barcelona, according to Ronald Koeman.
Pengurus Barcelona, Ronald Koeman, percaya Lionel Messi menghampiri tahap terbaiknya selepas menonjol ketika menentang Athletic Bilbao.
Barcelona responded well to falling behind at Athletic Bilbao, a positive sign for Ronald Koeman in the LaLiga title race.
Hosts Athletic Bilbao scored early and late on Wednesday, but Lionel Messi helped Barcelona claim all three points.
La Masia product Carles Alena has struggled to establish himself in Ronald Koeman's plans at Barcelona and is set to make a January move.
Barcelona membatalkan sesi latihan hari ini selepas dua staf pasukan utama mereka diuji positif koronavirus.