Hey, that adds another excuse to my already long list (sore back, tired, arm hurts, guy was a pusher, thinking about work, arguing with the wife, too windy, strings too loose, strings too tight, used a backup racquet, did not like the court, sun in eyes, bug got in my way, sneakers just not right, hangnail, hangover, ate too much, food was toxic, took a Benadryl, people on next court were too lound, saw a pretty girl and got distracted, too cold out, too hot out, not enough sleep, too much sleep...etc).
When I lose, there is always a reason... It was the balls!