Feedback from the keller-sports.com product management:
Whether you buy it in black/white or blue/white – this bag has a functional design at an affordable price. The Climate Control Technology equipped with a racket compartment which provides space for at least three rackets, and if needed, even four. The shoes can be stored away in a separate compartment, and the rest of your gear is protected from dirt. In the large main compartment clothes can be stored away as well as shower stuff, balls, drinks and what ever you need on the court. For smaller items such as wallets or cell phone there is a small side pocket.
Conclusion: It looks nice, and has a very good price-performance ratio, the Head Performance Tennis is exactly the bag you need.