2013 US Open Series
In tennis, the 2013 US Open Series was the tenth edition of the US Open Series, which included ten hard court tournaments that started on July 20, 2013 in Atlanta and concluded in Winston-Salem for the men and in New Haven for the women on August 24, 2013. This edition consisted of four separate men's tournaments and four women's tournaments, with the Western & Southern Open hosting both a men's and women's event. The series was headlined by two ATP [World Tour Masters 1000] and two Premier tournaments|WTA Premier 5 events]. Rafael Nadal and Serena Williams were the US Open Series winners, making them eligible for a $1 million bonus if either also won the US Open, a feat which they both accomplished, hence receiving the largest paychecks to date for a single tennis tournament, totalling $3.6 million each.
Point distribution for series events
In order to be included in the standings and subsequently the bonus prize money, a player needed to have countable results from two different tournaments. The players who finished in the top three in the series can earn up to $1 million in extra prize money at the US Open.| Round | ATP World Tour 1000 WTA Premier 5 | ATP World Tour 500 & 250 WTA Premier |
| Winner | 100 | 70 |
| Finalist | 70 | 45 |
| Semifinalist | 45 | 25 |
| Quarterfinalist | 25 | 15 |
| Round of 16 | 15 | 0 |
US Open Series standings
The standings include all players who received points in at least two tournaments.ATP
Notes:- 1 – Tours – Number of tournaments in US Open Series in which a player has reached the quarterfinals or better, in 250 and 500 series|500] series events or the Round of 16 in ATP World Tour Masters 1000 events.
WTA
- 1 – Tours – Number of tournaments in US Open Series in which a player has reached the quarterfinals or better, in Premier events; or the Round of 16 or better in Premier 5 events.
Bonus Prize Money
2013 schedule
| Week | Date | Men's Events | Women's Events |
| 1 | July 22 – July 28 | Atlanta Open|Atlanta] BB&T Atlanta Open 2013 Champion:  Week 1ATP – BB&T Atlanta OpenMain draw finalsWTA – Bank of the West ClassicMain draw finalsWeek 2ATP – Citi OpenMain draw finalsWTA – Southern California OpenMain draw finalsWeek 3ATP – Rogers Cup (Montreal)Main draw finalsWTA – Rogers Cup (Toronto)Main draw finalsWeek 4ATP – Western & Southern OpenMain draw finalsWTA – Western & Southern OpenMain draw finalsWeek 5ATP – Winston-Salem OpenMain draw finalsWTA – New Haven Open at YaleMain draw finals |