SLAZENGER NEAR ME The Slazenger Championship is a tournament quality tennis ball which is suitable for play on all different court surfaces with consistency. With new formulated Tour Core and Hydro guard technology results in a premium ball with consistent playing characteristics. It is up to 70% more water resistant than a standard ball. Pressurized tennis balls Tour core and Hydro guard technology All court surface tennis ball 70% more water resistant than a standard ball 3 tennis Balls per Can Tested and approved by ITF