Upset

A tennis player loses
And they say he’s been upset.
Well, naturally, I understand
Upset is what he’d get.

This term is never utilized
In any other sport.
At least, I’ve never heard it
In the sporting-news report.

“The Yankees were upset tonight,”
Implies they were in tears.
“The Knicks were so upset, they sobbed
In consolation beers.”

You’d never hear The Giants
Or the Cowboys got upset,
Yet tennis players publicly
Get linked with their regret.

I wonder how this word, so sad,
Became the one they use.
Would tennis players rather
Be upset or just plain lose?