(CNN) —
The US Open has fined Serena Williams $17,000 for three code violations during her loss in Saturday’s women’s singles final, the United States Tennis Association said.
Saturday’s match between Williams and Naomi Osaka in New York’s Arthur Ashe Stadium was marred by controversy in the second set after umpire Carlos Ramos penalized Williams a point and then an entire game. Osaka beat Williams in straight sets – 6-2, 6-4 – to win her first Grand Slam title.
Here’s why Serena Williams is calling out sexism
Ramos first issued a warning to Williams after ruling that her coach, Patrick Mouratoglou, gave her hand signals that Ramos said constituted illegal coaching. Williams denied the accusation and could be heard repeatedly demanding an apology from Ramos.
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Alize Cornet (FRA) plays her first round at the 2018 US Open at Billie Jean National Tennis Center in New York City, NY, USA, on August 28, 2018. Photo by Corinne Dubreuil/Abaca/Sipa USA(Sipa via AP Images)
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PARIS, FRANCE - MAY 28: Rafael Nadal of Spain plays a backhand during his mens singles first round match against Simone Bolelli of Italy during day two of the 2018 French Open at Roland Garros on May 28, 2018 in Paris, France. (Photo by Clive Brunskill/Getty Images)
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SEP 1989: YANNICK NOAH OF FRANCE PERFORMS A RUNNING FOREHAND DURING A MATCH AT THE 1989 US OPEN PLAYED AT FLUSHING MEADOWS IN NEW YORK.
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NEW YORK, NY - SEPTEMBER 10: Rafael Nadal of Spain bites the championship trophy during the trophy ceremony after their Men's Singles Finals match on Day Fourteen of the 2017 US Open at the USTA Billie Jean King National Tennis Center on September 10, 2017 in the Flushing neighborhood of the Queens borough of New York City. Rafael Nadal defeated Kevin Anderson in the third set with a score of 6-3, 6-3, 6-4. (Photo by Clive Brunskill/Getty Images)
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NEW YORK, NY - SEPTEMBER 09: Sloane Stephens of the United States poses with the championship trophy during the trophy presentation after the Women's Singles finals match on Day Thirteen of the 2017 US Open at the USTA Billie Jean King National Tennis Center on September 9, 2017 in the Flushing neighborhood of the Queens borough of New York City. Sloane Stephens defeated Madison Keys in the second set with a score of 6-3, 6-0. (Photo by Elsa/Getty Images)
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NEW YORK, NEW YORK - SEPTEMBER 03: Denis Shapovalov of Canada reacts during his fourth round match against Pablo Carreno Busta of Spain on Day Seven of the 2017 US Open at the USTA Billie Jean King National Tennis Center on September 3, 2017 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Richard Heathcote/Getty Images)
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NEW YORK, NY - SEPTEMBER 09: Sloane Stephens of the United States poses with the championship trophy during the trophy presentation after the Women's Singles finals match on Day Thirteen of the 2017 US Open at the USTA Billie Jean King National Tennis Center on September 9, 2017 in the Flushing neighborhood of the Queens borough of New York City. Sloane Stephens defeated Madison Keys in the second set with a score of 6-3, 6-0. (Photo by Elsa/Getty Images)
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LONDON, ENGLAND - JULY 15: Garbine Muguruza of Spain celebrates victory with the trophy alongside runner up Venus Williams of The United States after the Ladies Singles final on day twelve of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club at Wimbledon on July 15, 2017 in London, England. (Photo by David Ramos/Getty Images)
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Naomi Osaka, of Japan, holds the trophy after defeating Serena Williams in the women's final of the U.S. Open tennis tournament, Saturday, September 8 in New York.
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PARIS, FRANCE - MAY 28: Rafael Nadal of Spain plays a backhand during his mens singles first round match against Simone Bolelli of Italy during day two of the 2018 French Open at Roland Garros on May 28, 2018 in Paris, France. (Photo by Clive Brunskill/Getty Images)
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NEW YORK, NY - SEPTEMBER 10: Rafael Nadal of Spain bites the championship trophy during the trophy ceremony after their Men's Singles Finals match on Day Fourteen of the 2017 US Open at the USTA Billie Jean King National Tennis Center on September 10, 2017 in the Flushing neighborhood of the Queens borough of New York City. Rafael Nadal defeated Kevin Anderson in the third set with a score of 6-3, 6-3, 6-4. (Photo by Clive Brunskill/Getty Images)