Have you ever wanted to animate Ludwig playing Tennis? Well the first thing you'd likely want to do is model a Tennis ball.
reywillow does state:
Before we get started, I have to warn you that this is probably not the most optimized way to achieve this. I intended to make it the same way as the original tutorial, but under blender, not Maya. Also, I like the topology made this way.
No matter your opinion on the workflow this tutorial is a very good introduction into modeling in Blender and is easy to follow. Very clear instructions. Give it a go and post a link to your tennis ball.