The indentations on a golf ball are called “dimples”. There is no set rule for the maximum or minimum number of dimples on a competition golf ball, although most usually have around 350-400. The maximum ever imprinted on a ball was 1,070.

The grass on the tennis courts of Wimbledon is kept at precisely 8 mm (one-third of an inch) tall. It is an especially hardy type of rye grass.

The world’s biggest soccer stadium is in North Korea. The Rungrado has a capacity for 114,000 people and is the home stadium of the secretive nation’s national team.

The world’s biggest stadium overall, however, is the Narendra Modi Stadium in Ahmedabad, India, which is home to the Indian national cricket team. It can house 132,000 spectators.

The fastest recorded tennis serve was played by Australian Sam Groth at a competition in Busan in 2012. The ball was served at 163.4 mph.

It has been estimated that the world’s most popular sport is soccer, with more than three billion fans and players.

The world’s second-most popular sport is debatable, with hockey, volleyball, and golf all vying for the title. In terms of the number of spectators and fans, cricket is popularly said to come in second place.

The fastest swing speed of any bat sport is field hockey. Male players can strike the ball mid-game at more than 100 mph.