Soccer players are undoubtedly some of the fittest people on earth. But sometimes even the best have hidden underlying health conditions that can knock them down. Sadly, the history of the sport is tainted with stories of players who have collapsed on the pitch. From heart attacks to accidents that rendered them unconscious, we've seen our fair share of soccer stars collapsing.
Browse through the following gallery and revisit more of the terrifying moments when soccer players collapsed during a game.