Serena Williams withdraws from China Open, ending 2018 season in familiar fashion

Serena Williams has officially wrapped up her 2018 season.

The 23-time Grand Slam champion has withdrawn from the China Open in Beijing next week, which was set to be her final tournament of the year.

The decision to withdraw, though, likely has little to do with the ending to her controversial match at the U.S. Open earlier this month. This year marks the fourth-straight that the 37-year-old has declined to play in a tournament following the U.S. Open, making it almost a routine move for her at this point.

Williams has not played since her controversial match against Naomi Osaka in the U.S. Open Final earlier this month in New York. Williams fell to Osaka 6-2, 6-4, and was assessed three code of conduct violations in the match. Williams repeatedly argued with the umpire who assessed the penalties, and later said that they were unfair and only assessed because she is a woman.

See more from the controversial match: 

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Serena Williams argues with chair umpire at US Open finals
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Serena Williams argues with chair umpire at US Open finals
Sep 8, 2018; New York, NY, USA; Serena Williams of the United States yells at chair umpire Carlos Ramos in the women's final against Naomi Osaka of Japan on day thirteen of the 2018 U.S. Open tennis tournament at USTA Billie Jean King National Tennis Center. Mandatory Credit: Danielle Parhizkaran-USA TODAY SPORTS TPX IMAGES OF THE DAY
Sept 8, 2018; New York, NY, USA; Serena Williams of the USA argues with tournament referee Brian Earley while playing Naomi Osaka of Japan in the women?s final on day thirteen of the 2018 U.S. Open tennis tournament at USTA Billie Jean King National Tennis Center. Mandatory Credit: Robert Deutsch-USA TODAY Sports
Sep 8, 2018; New York, NY, USA; (L-R) Naomi Osaka of Japan, Serena Williams of the United States, and chair umpire Carlos Ramos talk after Ramos charges Williams with a game penalty in the second set in the women's final on day thirteen of the 2018 U.S. Open tennis tournament at USTA Billie Jean King National Tennis Center. Mandatory Credit: Danielle Parhizkaran-USA TODAY SPORTS
Sep 8, 2018; New York, NY, USA; (L-R) Naomi Osaka of Japan, chair umpire Carlos Ramos, and Serena Williams of the United States during the women's final on day thirteen of the 2018 U.S. Open tennis tournament at USTA Billie Jean King National Tennis Center. Mandatory Credit: Danielle Parhizkaran-USA TODAY SPORTS
Sept 8, 2018; New York, NY, USA; Serena Williams of the USA argues with chair umpire Carlos Ramos (not pictured) while playing Naomi Osaka of Japan in the women?s final on day thirteen of the 2018 U.S. Open tennis tournament at USTA Billie Jean King National Tennis Center. Mandatory Credit: Robert Deutsch-USA TODAY Sports
2018 US Open Tennis Tournament- Day Thirteen. Serena Williams of the United States argues with chair umpire Carlos Ramos during her match against Naomi Osaka of Japan in the Women's Singles Final on Arthur Ashe Stadium at the 2018 US Open Tennis Tournament at the USTA Billie Jean King National Tennis Center on September 8th, 2018 in Flushing, Queens, New York City. (Photo by Tim Clayton/Corbis via Getty Images)
2018 US Open Tennis Tournament- Day Thirteen. Serena Williams of the United States argues with chair umpire Carlos Ramos after receiving a one game penalty during her match against Naomi Osaka of Japan in the Women's Singles Final on Arthur Ashe Stadium at the 2018 US Open Tennis Tournament at the USTA Billie Jean King National Tennis Center on September 8th, 2018 in Flushing, Queens, New York City. (Photo by Tim Clayton/Corbis via Getty Images)
2018 US Open Tennis Tournament- Day Thirteen. Serena Williams of the United States argues with chair umpire Carlos Ramos after receiving a one game penalty during her match against Naomi Osaka of Japan in the Women's Singles Final on Arthur Ashe Stadium at the 2018 US Open Tennis Tournament at the USTA Billie Jean King National Tennis Center on September 8th, 2018 in Flushing, Queens, New York City. (Photo by Tim Clayton/Corbis via Getty Images)
USTA BILLIE JEAN KING NATIONAL T, NEW YORK, UNITED STATES - 2018/09/08: Serena Williams of USA reacts after receiving code violation during women's single final of US Open against Naomi Osaka of Japan at USTA Billie Jean King National Tennis Center. (Photo by Lev Radin/Pacific Press/LightRocket via Getty Images)
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Williams has won the China Open twice in her career — once at the inaugural event in 2004 and again in 2013. She has not competed there since 2014, when she reached the semifinals.

Williams, who is currently ranked No. 16 in the world, will likely take the court next at the Australian Open in January. She missed the event last year, declining to defend her 2017 title there shortly after giving birth to her child just months prior to the tournament.

She compiled a 18-6 record in 2018, reaching the final round at both the U.S. Open and at Wimbledon.

See Serena at Wimbledon: 

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Serena Williams at Wimbledon 2018
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Serena Williams at Wimbledon 2018
10th July 2018, All England Lawn Tennis and Croquet Club, London, England; The Wimbledon Tennis Championships, Day 8; Serena Williams (USA) a she pulsl backs to win her game against Camila Giorgi (ITA) (photo by John Patrick Fletcher/Action Plus via Getty Images)
TOPSHOT - US player Serena Williams returns against Italy's Camila Giorgi during their women's singles quarter-final match on the eighth day of the 2018 Wimbledon Championships at The All England Lawn Tennis Club in Wimbledon, southwest London, on July 10, 2018. (Photo by Daniel LEAL-OLIVAS / AFP) / RESTRICTED TO EDITORIAL USE (Photo credit should read DANIEL LEAL-OLIVAS/AFP/Getty Images)
LONDON, ENGLAND - JULY 10: Serena Williams (USA) during her victory against Camila Giorgi (ITA) in their Ladies' Quarter Final match at All England Lawn Tennis and Croquet Club on July 10, 2018 in London, England. (Photo by Rob Newell - CameraSport via Getty Images)
LONDON, ENGLAND - JULY 10: Serena Williams of the United States plays a backhand against Camila Giorgi of Italy during their Ladies' Singles Quarter-Finals match on day eight of the Wimbledon Lawn Tennis Championships at All England Lawn Tennis and Croquet Club on July 10, 2018 in London, England. (Photo by Clive Brunskill/Getty Images)
US player Serena Williams leaves the court after wining against Italy's Camila Giorgi during their women's singles quarter-final match on the eighth day of the 2018 Wimbledon Championships at The All England Lawn Tennis Club in Wimbledon, southwest London, on July 10, 2018. - Williams won the match 3-6, 6-3, 6-4. (Photo by Oli SCARFF / AFP) / RESTRICTED TO EDITORIAL USE (Photo credit should read OLI SCARFF/AFP/Getty Images)
US player Serena Williams celebrates breaking serve to go 3-1 up in the final set against Italy's Camila Giorgi during their women's singles quarter-final match on the eighth day of the 2018 Wimbledon Championships at The All England Lawn Tennis Club in Wimbledon, southwest London, on July 10, 2018. (Photo by Oli SCARFF / AFP) / RESTRICTED TO EDITORIAL USE (Photo credit should read OLI SCARFF/AFP/Getty Images)
US player Serena Williams arrives at the training courts on the eighth day of the 2018 Wimbledon Championships at The All England Lawn Tennis Club in Wimbledon, southwest London, on July 10, 2018. (Photo by Oli SCARFF / AFP) / RESTRICTED TO EDITORIAL USE (Photo credit should read OLI SCARFF/AFP/Getty Images)
US player Serena Williams serves to Russia's Evgeniya Rodina in their women's singles fourth round match on the seventh day of the 2018 Wimbledon Championships at The All England Lawn Tennis Club in Wimbledon, southwest London, on July 9, 2018. (Photo by Oli SCARFF / AFP) / RESTRICTED TO EDITORIAL USE (Photo credit should read OLI SCARFF/AFP/Getty Images)
LONDON, ENGLAND - JULY 09: Serena Williams (USA) during her victory against Evgeniya Rodina (RUS) in their Ladies' Singles Fourth Round match at All England Lawn Tennis and Croquet Club on July 9, 2018 in London, England. (Photo by Rob Newell - CameraSport via Getty Images)
LONDON, ENGLAND - JULY 06: Serena Williams of USA during her third round match against Kristina Mladenovic of France on day five of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club on July 6, 2018 in London, England. (Photo by Visionhaus/Corbis via Getty Images)
US player Serena Williams celebrates after beating France's Kristina Mladenovic 7-5, 7-6 in their women's singles third round match on the fifth day of the 2018 Wimbledon Championships at The All England Lawn Tennis Club in Wimbledon, southwest London, on July 6, 2018. (Photo by Glyn KIRK / AFP) / RESTRICTED TO EDITORIAL USE (Photo credit should read GLYN KIRK/AFP/Getty Images)
Serena Williams celebrates her win against Kristina Mladenovic on day five of the Wimbledon Championships at the All England Lawn Tennis and Croquet Club, Wimbledon. (Photo by Steven Paston/PA Images via Getty Images)
LONDON, ENG - JULY 04: SERENA WILLIAMS (USA) during day three match of the 2018 Wimbledon on July 4, 2018, at All England Lawn Tennis and Croquet Club in London,England. (Photo by Chaz Niell/Icon Sportswire via Getty Images)
Serena Williams serves on day five of the Wimbledon Championships at the All England Lawn Tennis and Croquet Club, Wimbledon. (Photo by Steven Paston/PA Images via Getty Images)
LONDON, ENGLAND - JULY 04: Serena Williams of The United States reacts during her Ladies' Singles second round match against Viktoriya Tomova of Bulgaria on day three of the Wimbledon Lawn Tennis Championships at All England Lawn Tennis and Croquet Club on July 4, 2018 in London, England. (Photo by Clive Mason/Getty Images)
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