Williams Concludes 2011 Season Ranked No.12 at US Open

Williams was seeded 17th at the US Open, although ranked 26th in the WTA. She prevailed over Magda Linette in the first round, Carina Witthöft in the second, Venus in the third, and Kaia Kanepi in the fourth. Williams's quarterfinal face-off against Karolína Plíšková was a rematch of the 2016 US Open semifinal, which the Czech player had won. Williams prevailed, notching her first win against a top 10 player since her return from pregnancy. Williams then won her semifinal match against Anastasija Sevastova, putting her into the final against Naomi Osaka. During the second set of the match, Williams was given a code violation because her coach, Patrick Mouratoglou, gave her coaching hand signals. Williams claimed Mouratoglou was simply giving her a thumbs-up, and demanded an apology from umpire Carlos Ramos. However, Mouratoglou later admitted in the after-game interview that he had been coaching, but believes Williams did not understand the hint. Williams then received a second violation for racket abuse, which resulted in a point penalty. After her third code violation for verbal abuse of the umpire, Williams received a game penalty, which caused her to lose the match. She was fined a total of $17,000 for the three offenses, although she claimed she was treated unfairly because she is a woman.