6. Serena Williams receives a code violation at the 2018 US Open.

Year of Fine: 2018;
Est. Fine Total: $17,000*
Serena fell short the previous four times she competed for Grand Slam glory, despite all the titles she has won over the years. Williams’ annoyance with Serena finally caught up to her at the 2018 US Open Finals, costing her over $20,000.

At the 2018 US Open, Serena Williams was found in violation of a code. Bradley Kanaris provided an image.
Serena lost it, calling the umpire a “liar” and a “thief” because she didn’t like the way the umpires had called the match or the penalties she had received during it. In the end, she had lost more than just game points to Williams. In addition to the heartbreak of missing the finals, she also had to pay a $17,000 fine.