In tennis, Doubles is a match played by four players, two on each side of the court.
The doubles court is 9 feet wider than a singles court. Players work together as a team to cover the court and outplay their opponents.
Doubles requires good communication and strategy between partners.
Famous doubles teams include the Bryan brothers, twins Bob Bryan and Mike Bryan in men's tennis and Martina Navratilova and Pam Shriver in women's tennis. These pairs won many Grand Slam titles together.