Referee Miguel Angel Perez Lasa has explained his decision to show Fabio Coentrao a straight red card in Real Madrid's 2-1 La Liga loss against Getafe on Sunday.
The Portugal international did not feature during Madrid's surprise loss, but was dismissed in the closing stages of the encounter after insulting the match official.
"In the 88th minute, the player (5) Fabio Alexandre Da Silva Coentrao was sent off for the following reason: he contacted me when the game was halted, and insulted me when I stood next to him by calling me a 'son of a whore'," Perez Lasa wrote in his official report, according to Marca.
Coentrao's dismissal will not have any consequences for the second leg of the Spanish Supercopa against Barcelona, however, as a suspension will only be valid for La Liga.
Madrid were beaten 3-2 in the first leg at Camp Nou last week, with the return to take place at the Santiago Bernabeu on Wednesday evening.