Almeria earned an impressive 2-0 win over La Liga title-chasers Atletico Madrid last night (Saturday).
However, things might have been very different had Helder Barbosa been dismissed for a horrific two-footed challenge on Thiago in the second-half.
With the scores level at 0-0, the Portuguese winger - on loan from Braga - lost control of the ball in an initial challenge with an Atletico midfielder.
And, in an attempt to win the ball back, the 26-year-old appeared to lose control as both feet came off the ground and down on the opponent's leg.
The referee had a perfect view of the incident, as shown in the video at the top of this story, but inexplicably appeared to opt against blowing for a free-kick. Barbosa got away with it, not picking up a yellow or red.
It wasn't such good news for Tiago, who was substituted after the incident and could be out for weeks with a sprained knee joint.
With the final result also going against Diego Simeone's side, things couldn't have gone much worse for Atletico.
Check out the nightmare tackle at the top of this article.