To Challenge

In tennis, you challenge a call
If you're sure of the way that the ball
     Hit the line or did not
     For, what happens a lot
Is the linesman missed where it did fall.

It's like Googling somebody's "fact"
If belief in a statement you lacked.
     You may prove him quite wrong
     If you knew all along
That the odds in your favor were stacked.

Yet in tennis, those options are few
So if somebody's view is askew
     And you've used your last chance
     Then, despite your best glance
There is naught you can do but to stew.