The Australian Open is the 1st tennis Grand Slam of the year and the Dunlop Australian Open Tennis Ball was the official ball of the 2019 tournament. The Dunlop Australian Open Tennis Ball is supplied in a pressurized tube containing 4 tennis balls. The ball use the HD Core and HD Pro Cloth technologies which make it easier to play with on all surfaces. 

Dunlop Australian Open Tennis Ball are ITF Approved and are Premium ultra durable All Court balls. 

The Dunlop AO tennis ball is a premium grade ball with high grade woven cloth, the HD core increases durability and feel.