Dunlop Competition Squash Ball - 1 Dozen (Single yellow dot) Dunlop Competition Squash Ball is a traditional-sized black squash ball for club players. The Dunlop Competition Squash Ball (single yellow dot) is aimed at club players or for use on very cool courts. It has a 10% longer hang time than the Dunlop Pro Squash Ball. Squash balls come in six varieties, each with different levels of bounce. A single yellow dot squash ball has a slow bounce with low speed (hang time) and is recommended for advanced players. When choosing a squash ball the temperature of the court, altitude of the court, your opponent's skill level and of course your skill level all play a part in determining which squash ball to use.