How about adapting a good song for the occasion? I'll start...
Sets on fire
Play where you're playing
Don't make a sound
I know they're watching
they're watching
All the commotion
the kid's lovely play
has people talking
You... Your sets are on fire
The dark of the night's queue
The break of the day
Your forehands are driving
They're driving
Soft grip is open
Our knuckles are pale
Looks like you're flying
You're flying
You... Your sets are on fire
And so... were the words to transpire
Shots in a fever
Rattle our bones
Your first serve don't waste it
Waste it
But it's not forever
But it's just two weeks
You could be the greatest
The greatest
The greatest
You... Your sets are on fire
You legend!