Tennis originated in England in the 12th century as a game played with the palm of the hand.

The original name of tennis was 'Real Tennis' or 'Court Tennis', which was played indoors on a court with high walls.

Lawn tennis, played on an outdoor grass court, emerged in the 1870s and quickly gained popularity.

Walter Clopton Wingfield is credited with inventing the modern rules of lawn tennis in 1873.

Wimbledon, held in London, England, is the oldest tennis tournament in the world, dating back to 1877.

Roger Federer holds the record for the most Wimbledon titles in the Open Era, with 8 titles to his name.

Rafael Nadal is known as the 'King of Clay' due to his exceptional performance on clay courts, winning a record 13 French Open titles.

Novak Djokovic holds the record for the most Grand Slam titles in the Open Era, with 22 titles to his name.

Serena Williams is known for her powerful serve and aggressive style of play, earning her the nickname 'Serena Slam' for winning all four Grand Slams in a single calendar year.

The United States holds the record for the most Davis Cup titles, with 32 titles to their name.

The United States also holds the record for the most Fed Cup titles, with 18 titles to their name.

The scoring system used in tennis is 'Love-15-30-40', where 'Love' represents zero.

The rule that allows a player to serve twice if the first serve hits the net but lands in the service box is called a 'Let'.

The rule that determines who serves first in a tennis match is a 'Coin Toss'.

The rule that allows a player to challenge a line call if they believe it was incorrect is called a 'Challenge'.