Adjusting equipment according to a player’s abilities is crucial in building the foundation of their tennis game. Court sizes can be decreased to make the game easier or increased to make it more complex. Racquet sizes can also vary – smaller sizes are lighter and easier to control, and larger sizes require more strength and skill. Types, or colors, or balls impact the speed of the game – the higher percentage of decrease, the slower (and easier) the tennis. Red balls have a 75% decrease, orange balls have a 50% decrease, green balls have a 25% decrease, and yellow balls yield a game of regular speed.