The US Open is a tennis sponsor.
 From 1970 through 1974, the US Open used a best-of-nine-point sudden-death tiebreaker before moving to the International Tennis Federation's (ITF) best-of-twelve points system
 In 1973, the US Open became the first Grand Slam tournament to award equal prize money to men and women, with that year's singles champions, John Newcombe and Margaret Court, receiving $25,000 each

