AH, the famous defeatist attitude. I"m too old. I"m too injured. I can't see. I"m out of shape.
OK, all those are true with me too. OTOH, I can still hit my first serves as hard as I can. I can hit forehand winners given a 10' opening. I can hit any overhad for a winner if I"m near the service line. I can hit every single second serve IN, by swinging as fast as I can swing.
See the difference? I lose because I missed. YOU lost because you allowed your opponent to beat you. We both lost. Remember, I"m a 4.0, just like YOU. But I hit 5.0 level shots. You hit 3.5 level shots, but are more consistent than me.
A lion, or a sheep, your choice.