The first round was played by all the qualified teams except the four participants in the Supercopa de España paired by a draw where the ten winners from the previous preliminary round were paired with ten teams from the La Liga. The remaining six teams and the 22 teams of Segunda were paired with the four Copa Federación semifinalists, the 21 that compete in Tercera and three from Segunda B. Finally, the remaining 35 teams from Segunda B were paired between them, one team received a bye in this round. In the case of rivals of the same category, the home advantage was decided by the order of extraction of the balls and otherwise, it was in the stadium of the lower category team. A total of 55 games were played, with 111 participating teams, from December 17 to 19, 2019.