Automatically add reward product to the cart and only specific variants

When any racket (X) is added to the cart, the customer should automatically get a free overgrip and free balls.

However, for a specific special collection of rackets, I want an additional reward. In those cases, the cart should add three free items: the balls, the overgrip, and a protector.

So, for that specific collection, the system must trigger all three free products at once.