Design a logo for a tennisschool in Zurich, Switzerland

This is what SKILL Tennis Academy was looking for in their logo design

I am opening a Tennisschool in Zürich Switzerland.
The School is focused on KidsTennnis starting from 4 year old all the way to competitive Players. No Adults.Lots of Expad Kids.

However, the logo must also appeal to parents, not just children. Therefore, it must not be too childish!

Adjectives to describe my brand traits:
-Athletic
-Fun,Cool
-Familiar

Preferred colors: yellow,orange,red,black
I'm also open to other colors than those mentioned above. Read more