&sq=&lang=&file=File:Question_book-new.svg){kind=small} | This article needs additional citations for verification. (September 2018) |
| 2018 US Open | |
|---|---|
| Date | August 27 – September 9 |
| Edition | 138th |
| Category | Grand Slam (ITF) |
| Draw | 128S/64D/32X |
| Prize money | $53,000,000 |
| Surface | Hard |
| Location | New York City, New York, United States |
| Venue | USTA Billie Jean King National Tennis Center |
| Champions | |
| Men's singles | |
 Novak Djokovic | |
| Women's singles | |
 Naomi Osaka | |
| Men's doubles | |
 Mike Bryan / Jack Sock | |
| Women's doubles | |
 Ashleigh Barty / CoCo Vandeweghe | |
| Mixed doubles | |
Bethanie Mattek-Sands /  Jamie Murray | |
| Wheelchair men's singles | |
| Alfie Hewett | |
| Wheelchair women's singles | |
 Diede de Groot | |
| Wheelchair quad singles | |
| Dylan Alcott | |
| Wheelchair men's doubles | |
| Alfie Hewett / Gordon Reid | |
| Wheelchair women's doubles | |
| Diede de Groot / Yui Kamiji | |
| Wheelchair quad doubles | |
| Andrew Lapthorne / David Wagner | |
| Boys' singles | |
 Thiago Seyboth Wild | |
| Girls' singles | |
 Wang Xiyu | |
| Boys' doubles | |
 Adrian Andreev / Anton Matusevich | |
| Girls' doubles | |
| Coco Gauff / Caty McNally | |
The 2018 US Open was the 138th edition of tennis' US Open and the fourth and final Grand Slam event of the year. It was held on outdoor hard courts at the USTA Billie Jean King National Tennis Center in New York City.
Rafael Nadal and Sloane Stephens were the defending champions in the men's and women's singles events, however both failed to defend their titles. Nadal retired during his semifinal match against Juan Martín del Potro. Stephens was defeated in the quarterfinals by Anastasija Sevastova, whom Stephens had beaten at the same stage the previous year.
Novak Djokovic won the men's singles title, defeating del Potro in the final, 6–3, 7–6(7–4), 6–3. It was his third US Open title and 14th Grand Slam, tying Pete Sampras' record to become equal third among all-time Grand Slam champions. In women's singles, Naomi Osaka defeated Serena Williams in the final, 6–2, 6–4, becoming Japan's first-ever able-bodied Grand Slam singles champion.