HUESCA head coach Juan Antonio Anquela appeared to headbutt one of his own players during a Second Division football play-off match against Getafe on Saturday.
In the 60th minute, boss Anquela decided to make a substitution but midfielder David Lopez was not happy about it.
After high-fiving his replacement and kicking a drink bottle, Lopez then unleashed his frustration on Anquela.
Anquela approached Lopez and shouted at the player before throwing his head forward.
Lopez fell back into the dugout before staff and players stepped in to separate them.
Huesca went on to lose the game 3-0.