Abstract: A bag for collecting, storing and carrying tennis balls and similar sports equipment. The bag has a first opening to attach to a collection device such as a tube collector. The balls are directed into the bag when the collection process has completed or when the collector overflows. The bag is detachable from the collector. The bag holds over twenty balls for easy carriage and access. The bag may be worn over the shoulder with an attached shoulder strap. A second opening with a closing mechanism allows a user to quickly access or dump the balls within the bag. The second opening may be positioned along the top or bottom of the bag. This opening allows the bag to be used in place of a ball hopper. A third opening may be present on the top or bottom of the bag opposite the second opening.