And its results. In the video below you will see tennis professional Victoria Azarenka collapse on the court at the US Open in New York.
Although the conditions were hot, and she had been complaining of abdominal pain earlier in the week, it was later found out that Azarenka sustained a concussion just prior to the match. While warming up for the match she fell and hit her head. The doctors and official report blame the fainting on the concussion.
I had missed this story until today, with the thought it was heat related, but after further investigation, it was yet another example of a poorly handled concussion.