No Racket No Bother
After a long day of work, it is common that the mind starts glitching, and you find yourself doing things that make no sense. You are not even consciously making these decisions, and it is like your mind is on autopilot. Athletes are also humans, and even though they have razor focus, they can slip up.
Stanislas Wawrinka was clearly having one of these days. He left his racket behind and proceeded to serve the ball with his bare hands! In the history of goof ups, this one definitely ranks high!