The expedite rule is a rule which is designed to make games finish quicker.
Because games were becoming longer and longer in the 1930s, the expedite rule was introduced in 1936.
It has been changed several times since it was introduced, but it now says that if a game is unfinished after 10 minutes' play, the expedite rule comes into force.
Using the expedite rule, players serve alternately, and the onus on winning the point is with the server because if the receiving player or pair makes 13 returns, the receiver will win the point.
Chat with our AI personalities