Take a look at this past blog that Humintell posted about face covering and sports. There are some interesting insights into this phenomenon.
But why exactly do people cover their face in emotional and stressful times?
Some individuals believe that the face cover is only a part of social communication, but Dr. Matsumoto believes that it is not. He believes that individuals often cover their face to conceal their emotions and that it is an immediate reaction that most people cannot control.