The first thing is… Never give up! I have won many table tennis 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.
The third thing to consider is… Am I missing, or is he dominating? If I’m having an off-day, which particular shots am I missing? If I’m making many backhand errors, why not move better and play more forehand. If I’m not flipping the short ball well, why not push. If my opponent is dominating, which particular shot is he winning most of his points with? See if I can devise a plan to take away his strengths.
The final thing to consider is… Maybe I should try a totally different strategy. I might try pushing and blocking instead of all-out attacking. It can’t hurt. I could even play further from the ping-pong® table or closer to the table. Even with a strategy change for a couple points, my opponent might make a few errors and allow me back into the game.