Monterrey beat Pachuca 1-0 in the Liga MX at the weekend.
The score wasn’t the main talking point of the game, however.
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Instead, it was a brutal clash of heads between Monterrey’s Hiram Mier and Pachuca’s Ariel Nahuelpan.
Nahuelpan came off worse, and was left concussed on the floor with blood literally running out of his head.
The video below shows just how serious the incident was:
Here’s an image of the after-effects:
La cabeza de Nahuelpan. Ouch. pic.twitter.com/zwhjxx3rnb
— Alejandro Alfaro (@AlexAlfaro48) January 18, 2015