Slovacko striker Francis Kone reportedly saved the life of Bohemians' Martin Berkovec after the goalkeeper fell unconscious during a Czech First League match between the two sides on Saturday.
Berkovec collided with his team-mate Daniel Krch, and Kone reacted speedily to make sure the shotstopper didn't swallow his tongue.
Per Ian Holyman of ESPN FC, both Berkovec and defender Krch were taken to hospital before it was announced that the pair were recovering well.
Berkovec later posted a message on his Facebook page in gratitude to his opponents' actions.
He wrote: "I would like to thank Francis Kone for his quick action in saving me during today's match. I am grateful for the prompt help, and once again THANK YOU!!!"
Bohemians released this image of Kone's quick-thinking on their Twitter account:
After the match at the Dolicek Stadium in Prague ended 0-0, Togo international Kone was praised for his professionalism by Bohemians coach Miroslav Koubek.
"I would like to put sport to one side and thank Kone, who provided first aid," Koubek said.
"He acted very professionally in the situation, administered first aid and retrieved his tongue. As far as I'm concerned, that was more important than the whole game."
Kone told reporters (via ESPN FC) that it was the fourth time he had leapt into action in similar fashion, adding: "Twice in Africa, once in Thailand. I immediately checked to see if he had swallowed his tongue."