The worst types of mistakes/misses/unforced errors in professional Tennis. Every single tennis player, pro or amateur, and even the greatest tennis players of our time can fizzle terribly in some moments. Rafael Nadal, Roger Federer, Novak Djokovic and Andy Murray have also failed countless times in some of the most basic shots. But they know failure is necessary and it’s the only way we can push ourselves further. If we want to become the best version of ourselves we have to constantly invest energy and extend our limits.