| 1970 US Open | |
|---|---|
| Date | 2 September – 13 September |
| Edition | 90th |
| Category | Grand Slam (ITF) |
| Surface | Grass |
| Location | Forest Hills, Queens, United States |
| Venue | West Side Tennis Club |
| Attendance | 122,996[1] |
| Champions | |
| Men's singles | |
 Ken Rosewall[2] | |
| Women's singles | |
| Margaret Court[3] | |
| Men's doubles | |
 Pierre Barthès /  Nikola Pilić[4] | |
| Women's doubles | |
| Margaret Court / Judy Tegart-Dalton[3] | |
| Mixed doubles | |
Margaret Court /  Marty Riessen[3] | |
The 1970 US Open was a tennis tournament that took place on the outdoor grass courts at the West Side Tennis Club in Forest Hills, Queens, in New York City, United States. The tournament ran from 2 September until 13 September. It was the 90th staging of the US Open, and the fourth Grand Slam tennis event of 1970.
It was the first Grand Slam tournament in which the tiebreak was used to decide the set at a 6–6 score. The 1970 US Open was the first tournament to introduce a final set tie-break in a Grand Slam. It differed from the current tie-break scoring in that it was won by the first player to reach five points with a sudden death at 4-4. A red flag would be put up by the umpire's seat to draw fan attention to the tiebreaker in progress. Most players disapproved of the tiebreaker but the visitors loved it.[5][6]
- ^ Ashley Marshall (September 3, 2018). "From the archive: the 1971 US Open Media Guide". USTA.
- ^ Cite error: The named reference
ATPchampmswas invoked but never defined (see the help page). - ^ a b c Cite error: The named reference
WTA1970was invoked but never defined (see the help page). - ^ Cite error: The named reference
ATPchampmdwas invoked but never defined (see the help page). - ^ World of Tennis 1971. London: Queen Anne Press. 1971. p. 110. ISBN 978-0362000917.
- ^ "Jimmy Van Alen". International Tennis Hall of Fame. Archived from the original on 2012-06-14. Retrieved 23 May 2012.