On the hard court, each contact with the ground immediately leads to a relatively large abrasions on the knee or thigh. On these playing fields, falls can easily lead to bruises, too. The unfamiliar cold can also mean additional discomfort, which might negatively influence their playing skills. The player can avoid these situations by wearing sweat pants underneath their colored shorts, which is allowed according to the rules. In extremely cold weather, tights, used especially for gymnastics, can be worn as well.