Tennis is a popular worldwide racket sport played between two singles players or two doubles teams on a court made of grass, clay, or concrete divided by a net. The objective is to hit the ball over the net so the opponent cannot return it, playing sets which are made up of games that use a points scoring system. In the author's town, tennis has an important club and school students participate at national and international levels. Taekwondo is a martial art and Olympic sport known for kicking techniques. Matches involve two opponents trying to score points with kicks over three-minute rounds, and can be won by knockout, points, or penalties. The town has several successful taekwondo clubs including Club Koryo