GCS Grass Court Sports logo concept with silhouettes of the ball shapes inside rounded "G C S" letters. No gradients, recognizeable shapes, easy to reproduce. Will try and work on some variations of this for you.
Entry #70: Can we try the dark green on entry #91? and separate a little the letter R and T. I don't like the sharp lines below the balls. Can we center the tennis ball?
Here is a more abstract concept that represents the 3 sports: yellow for tennis ball, blue for soccer ball, green for golf green. The shapes shoot out from the center suggesting "sporty".
Each shape is easily recolored for various purposes. And with a more abstract sporty look, you're not stuck with clip art images of balls.