Tennis is played on a court covered with grass, clay or synthetic material.
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- baseline 8.23 m (27 ft)
- 1.372 m (4.5 ft)
- 16.177 m (53.07 ft)
- 23.77 m (77.99 ft)
- 6.4 m (21 ft)
- 5.5 m (18.04 ft)
- center service line
- center mark
Several different sporting events can be held in an athletics stadium.
Basketball is one of the most popular team sports.
Handball is one of the most popular team sports.
Soccer is one of the most popular team sports due to its relatively low equipment requirements and simple set of rules.
Skeletal muscles form the active part of the locomotor system: they move the bones they are attached to.
The knee joint is made up by the femur, the tibia and the kneecap.