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.
United Indoor Football
United Indoor Football was played exclusively indoors, in arenas usually designed for either basketball or ice hockey teams. The field was the same width (85 feet) as a standard NHL hockey rink. The field was 50 yards long with up to an 8-yard end zone. (End zones could be a lesser depth with League approval.) Depending on the stadium in which a game was being played, the end zones may be rectangular (like a basketball court) or curved (like a hockey rink). There was a heavily padded wall on each sideline, with the padding placed on top of the hockey dasher boards. The field goal uprights were 9 feet wide, and the crossbar was 18 feet above the playing surface. Unlike Arena football, the ball was not "live" when rebounded off the nets behind the end zone or their support apparatuses.