After the Copa del Rey, they soon realised there was a mess with fixtures. Leganés, drawn against Real Madrid, were scheduled to play Monday against Real Betis before the Copa clash while Real Madrid were set to play on the Saturday against Deportivo la Coruña meaning there was no fair way to have the Copa game midweek without leaving one team short of recovery time.
The schedule-makers had a look at the fixtures and decided to switch games the following weekend, after the game so Atlético and Girona play on Saturday instead of Sunday and Real Madrid and Depor take their slot on the Sunday.
MODIFICACIÓN | El @Atleti - @GironaFC se adelanta al sábado 20 a las 16:15 horas, mientras que el @realmadrid - @RCDeportivo se jugará finalmente el domingo 21 a las 16:15 horas. https://t.co/9ErxfzOFnR pic.twitter.com/YjScWiRwDo— LaLiga (@LaLiga) 12 de enero de 2018
Times for Gameweek 20 of LaLiga Santander
Friday, 19 January
Saturday, 20 January
16:15 Atlético-Girona (changed)
20:45 Las Palmas-Valencia
Sunday, 21 January
16:15 Real Madrid-Deportivo (changed)
18:30 Real Sociedad-Celta
Monday, 22 January