Tennis polo
The sport is played on a grass field between 80 and 100 yards long and 50 to 65 yards wide. The goal area is a semicircular line with an 11-yard radius and the penalty mark at 13 yards from the goal. An experimental rule has a second semicircular line on the field with a 17-yard radius. Generally, a field for gridiron football or soccer can be used.
Metrication in the United States
Measured distances as used in events such as shot put, high jump, and discus throw are, however, often in feet and inches, except at the national and international levels. In 2017, the Florida High School Athletic Association became the first to buck this trend and use metric measures for field events. The field and court sizes for most popular team sports such as soccer were originally set in non-metric units. This is reflected in American football, in which the playing field is divided into yards, and many important statistics are measured in yards. Similarly, the dimensions for all baseball parks, basketball courts, tennis courts and ice hockey rinks are given in feet, golf courses in yards, auto racing tracks in miles (or fractions thereof), and horse racing in furlongs. The lengths of automobile races in the U.S. are generally set in miles. On the other hand, some sporting equipment, such as skis and poles, is sold in metric units.