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.
Lane Field (baseball)
According to a 2004 "San Diego Union-Tribune" article, the original field dimensions were 339 feet to the left field foul pole, 480 to the deepest part of center field, and 355 feet to right, a large rectangle. Along with the other remodeling, the dimensions were eventually reduced to a more normal size: 329 to left, 426 to center, 330 to right.