Overplaying!
In 2016, I was selected as a US National Team Coach.  Throughout 2016, as I talked with many national team players, one main topic continued to rise to the surface – OVERPLAYING! 
Remember:
 
The biggest upsets happen when you play normal.
 

Massimo Costantini Interview - Part II
The Mental Side of Table Tennis

Learn about the mental side of the game, learn about overcoming nerves, learn how to win deuce games, learn about visualization, and much much more!!!

I am playing a very important match in a tournament; I am losing 2-0 in games and now losing 5-0 in the third game. What should I do?
 
The first thing is… Never give up! I have won many matches because of a third-game comeback. My opponent starts crying to himself that he should have finished the match and the momentum swings to me.
 
The second thing is… Call time out. A friend or coach might be able to give me tips, insights, or encouragement which could really help.
 

Your mental attitude has a TREMENDOUS influence over the outcome of the game. It can help you beat players rated much higher than you. However it can be a humongous factor in losses against players rated much lower than you. This can set back your goals in table tennis. So how do you fix it?