# 2015 WTA Tour
The 2015 WTA Tour was the annual circuit of professional women's tennis organized by the [Women's Tennis Association](https://www.edgepedia.org/womens-tennis-association), running from the first week of January to mid-November and dominated by [Serena Williams](https://www.edgepedia.org/serena-williams), who won the season's first three Grand Slam titles and finished as year-end world No. 1 for the fifth time.[1](https://as.com/us/us/2015/11/11/masdeporte/1447267418_433976.html)
| Key fact | Detail |
|---|---|
| Year-end No. 1 | Serena Williams, her fifth year-end No. 1, making her the fourth woman in WTA history to reach at least that mark[1](https://as.com/us/us/2015/11/11/masdeporte/1447267418_433976.html) |
| Williams' majors | Australian Open, Roland Garros, and Wimbledon, her 19th through 21st career Grand Slam singles titles[1](https://as.com/us/us/2015/11/11/masdeporte/1447267418_433976.html) |
| Season record | 53-6 (.898) per the WTA's own season review; the Spanish daily AS counted 53 wins against 3 losses[2](https://www.wtatennis.com/news/2896245/iga-swiatek-and-a-look-at-the-best-seasons-this-century) • [1](https://as.com/us/us/2015/11/11/masdeporte/1447267418_433976.html) |
| US Open upset | Roberta Vinci beat Williams in the semifinals, ending the calendar Grand Slam bid; Flavia Pennetta then won the first all-Italian major final[3](https://www.wtatennis.com/news/1367607/about-the-wta) |
| WTA Finals | Singapore, October 25 to November 1, hard court, $7,000,000 commitment; singles champion Agnieszka Radwanska, doubles champions Martina Hingis and Sania Mirza[4](https://wtafiles.wtatennis.com/pdf/publications/WTA24MG_WTAFinals.pdf) |
| Prize money | Williams led the season with $10,582,642, listed among the tour's top single-season earners[5](https://wtafiles.wtatennis.com/pdf/publications/WTA24MG_RecordBook.pdf) |
## Calendar structure
The season's top tier sat above the WTA's own events: the four Grand Slam tournaments were supervised by the [International Tennis Federation](https://www.edgepedia.org/international-tennis-federation), while the Fed Cup, the national team competition, was also organized by the ITF.
The Premier Mandatory and Premier 5 events of 2015 included Indian Wells (March 9 to 22), Miami (March 23 to April 5), Madrid (May 4 to 10), Rome (May 11 to 17), Montreal/Toronto (August 10 to 16), Beijing (October 5 to 11), Wuhan (September 28 to October 4), and the Dubai and Doha events in February.[6](https://www.the-sports.org/tennis-wta-tour-calendar-2015-s4-c0-b0-g5-u287.html) Simona Halep won three of the biggest titles outside the majors, taking Brisbane, Dubai, and Indian Wells.[6](https://www.the-sports.org/tennis-wta-tour-calendar-2015-s4-c0-b0-g5-u287.html)
## Serena Williams' season
**Three majors and a near-Slam.** Williams won the [Australian Open](https://www.edgepedia.org/australian-open), Roland Garros, and Wimbledon, bringing her career total to 21 Grand Slam singles titles and moving her within one of [Steffi Graf](https://www.edgepedia.org/steffi-graf)'s 22 and three of [Margaret Court](https://www.edgepedia.org/margaret-court)'s 24.[1](https://as.com/us/us/2015/11/11/masdeporte/1447267418_433976.html) Because she had already won the 2014 US Open, the Wimbledon title secured her second "Serena Slam", holding all four major trophies at once.[2](https://www.wtatennis.com/news/2896245/iga-swiatek-and-a-look-at-the-best-seasons-this-century) She entered the US Open attempting to become the first player to complete the calendar-year Grand Slam since Graf in 1988.[3](https://www.wtatennis.com/news/1367607/about-the-wta)
Her three losses, as counted by AS, came to Petra Kvitova in the Madrid semifinals, [Belinda Bencic](https://www.edgepedia.org/belinda-bencic) in the Toronto semifinals, and [Roberta Vinci](https://www.edgepedia.org/roberta-vinci) in the US Open semifinals.[1](https://as.com/us/us/2015/11/11/masdeporte/1447267418_433976.html) She also won the Premier Mandatory titles at Miami and [Cincinnati](https://www.edgepedia.org/cincinnati), bringing her career title count to 69.[1](https://as.com/us/us/2015/11/11/masdeporte/1447267418_433976.html) After Wimbledon she held more than double the ranking points of world No. She held the No. 1 ranking uninterrupted through the entire season, one of the few wall-to-wall years in WTA rankings history.[7](https://www.wtatennis.com/news/4399733/the-2025-year-end-rankings-wrap-milestones-movers-records-and-more)
**A shortened finish.** After the US Open defeat, Williams withdrew from the China Open and the season-ending [WTA Finals](https://www.edgepedia.org/wta-finals) in Singapore to recover from injury, ending her season early despite having already clinched the year-end No. 1 mathematically during the US Open.[8](https://www.bbc.co.uk/sport/tennis/34413153) • [1](https://as.com/us/us/2015/11/11/masdeporte/1447267418_433976.html)
## The US Open and the all-Italian final
Roberta Vinci's semifinal win over Williams thwarted the calendar Grand Slam bid. Vinci then faced [Flavia Pennetta](https://www.edgepedia.org/flavia-pennetta) in the final, the first all-Italian Grand Slam singles final, which Pennetta won.[3](https://www.wtatennis.com/news/1367607/about-the-wta)
## WTA Finals and Elite Trophy
The year-end championships returned to Singapore, the first Asian-Pacific host city for the season finale, which had debuted there in 2014. The 2015 edition ran October 25 to November 1 on hard courts with a total commitment of $7,000,000 and eight-player singles and doubles draws.[9](https://www.wtatennis.com/tournaments/808/wta-finals/2015) In the round robin, [Maria Sharapova](https://www.edgepedia.org/maria-sharapova) and [Garbiñe Muguruza](https://www.edgepedia.org/garbine-muguruza) each went 3-0 to top their groups, while [Simona Halep](https://www.edgepedia.org/simona-halep), the top seed, went 1-2 and did not advance.[4](https://wtafiles.wtatennis.com/pdf/publications/WTA24MG_WTAFinals.pdf) Agnieszka Radwanska won the singles title, her first at the year-end event, and Martina Hingis and Sania Mirza won the doubles.[4](https://wtafiles.wtatennis.com/pdf/publications/WTA24MG_WTAFinals.pdf) • [10](https://www.wtatennis.com/tournaments/808/tour-championships/2016/past-winners)
The second-tier year-end event, the WTA Elite Trophy in Zhuhai, China, was won by [Venus Williams](https://www.edgepedia.org/venus-williams), who thereby returned to the year-end Top 10 for the first time in almost five years.[3](https://www.wtatennis.com/news/1367607/about-the-wta)
## Doubles and other storylines
**Hingis and Mirza.** Martina Hingis burnished her doubles comeback with titles at Wimbledon, the US Open, and the WTA Finals partnering Sania Mirza, who became the first Indian woman to hold a WTA No. 1 ranking.[3](https://www.wtatennis.com/news/1367607/about-the-wta)
**Muguruza's breakthrough.** In the week she turned 22, Garbiñe Muguruza won her first Premier Mandatory title at Beijing, defeating Timea Bacsinszky 7-5, 6-4, and qualified for the WTA Finals for the first time.[11](https://as.com/tenis/2015/10/11/mas_tenis/1444541010_473476.html)
Other multiple winners on the calendar included Angelique Kerber, who took Charleston, Stuttgart, Birmingham, and Stanford; Petra Kvitova, who won Sydney, Madrid, and New Haven; Agnieszka Radwanska, who won Eastbourne, Tokyo, Tianjin, and the WTA Finals; and Venus Williams, who won Auckland, Wuhan, and the Elite Trophy.[6](https://www.the-sports.org/tennis-wta-tour-calendar-2015-s4-c0-b0-g5-u287.html)
## References
1. [Serena termina la temporada como la número uno del mundo, AS (11 November 2015)](https://as.com/us/us/2015/11/11/masdeporte/1447267418_433976.html)
2. [Iga Swiatek and a look at the best seasons this century, WTA Tennis (6 November 2022)](https://www.wtatennis.com/news/2896245/iga-swiatek-and-a-look-at-the-best-seasons-this-century)
3. [About the WTA, WTA Tennis](https://www.wtatennis.com/news/1367607/about-the-wta)
4. [WTA Finals record book, WTA publications (PDF)](https://wtafiles.wtatennis.com/pdf/publications/WTA24MG_WTAFinals.pdf)
5. [WTA Record Book, top single-season prize money leaders (PDF)](https://wtafiles.wtatennis.com/pdf/publications/WTA24MG_RecordBook.pdf)
6. [Tennis, WTA Tour: results and calendar for the season 2015, TheSports.org](https://www.the-sports.org/tennis-wta-tour-calendar-2015-s4-c0-b0-g5-u287.html)
7. [The 2025 year-end rankings wrap: milestones, movers, records and more, WTA Tennis](https://www.wtatennis.com/news/4399733/the-2025-year-end-rankings-wrap-milestones-movers-records-and-more)
8. [Serena Williams to take rest of year off to recover from injury, BBC Sport](https://www.bbc.co.uk/sport/tennis/34413153)
9. [BNP Paribas WTA Finals Singapore presented by SC Global 2015, WTA Tennis](https://www.wtatennis.com/tournaments/808/wta-finals/2015)
10. [WTA Finals past winners, WTA Tennis](https://www.wtatennis.com/tournaments/808/tour-championships/2016/past-winners)
11. [Muguruza brilla como un diamante en Pekín, AS (11 October 2015)](https://as.com/tenis/2015/10/11/mas_tenis/1444541010_473476.html)
---
*Topic: Encyclopedia › Sports, games, and recreation › Other team and ball sports › Racket and precision ball sports › Tennis › Tennis tournaments and circuits › ATP, WTA, and Challenger tour events › ATP and WTA tour structure and seasons*
*Initially written Sep 17, 2026 · Reviewed: Oct 21, 2026 · Edited: Oct 15, 2026; Oct 21, 2026; Oct 25, 2026 · Last review: Oct 21, 2026*
*Copyright 2026 EdgeChat AI, a subsidiary of Biostate AI.*
License: Edgepedia Community License 1.0, https://www.edgepedia.org/edgepedia/license