While Veronica was playing tennis, I roamed the Windward Lake Club for some photo ops. I found these tennis balls on a beautiful stone patio - they were already grouped together like this. 99% of the time, I do not arrange the subjects of my photography, I prefer to take things as I find them and then interpret them through my composition and post processing. This image looked much more dramatic to me in black and white.
Best viewed enlarged. And yes, Veronica won her match!
I like the tones you've used for this - they mask the typical tennis ball colours and make you have to really look at the image to figure out what it is you're seeing :)