Carlos Ramos

Carlos Ramos (born 1972) Ramos, a gold badge chair umpire certified by the International Tennis Federation, is one of only three persons to have chair umpired a singles finals match in all four of the Grand Slam tournaments, the other two being Alison Hughes and Louise Azemar Engzell. making Ramos the only umpire to have chair umpired a singles final at all four Grand Slam tournaments and the Olympics. He has also officiated a number of matches in the Davis Cup.

Grand Slam finals Ramos has been in the chair of a number of Grand Slam finals during his career, including: 2005 Australian Open – Men's singles 2005 French Open – Women's singles Kyrgios continued to clash with Ramos after the violation was issued, stating later that Ramos was operating on a double standard. Kyrgios claimed his opponent (Marco Cecchinato) also was committing violation-worthy offenses. Murray described Ramos as a "very good umpire", but criticized the penalty.

2018 US Open

At the 2018 US Open women's singles final between Serena Williams and Naomi Osaka, Ramos issued numerous code violations to Williams. Williams' first code violation was a warning for receiving coaching during the match (Williams' coach, Patrick Mouratoglou, later admitted to coaching using hand signals, though he noted the rule against such signals was not always enforced). Willams then told Ramos: "You will never, ever, ever be on another [tennis] court of mine as long as you live ... You owe me an apology. Say it. Say you’re sorry ... How dare you insinuate that I was cheating. You stole a point from me. You're a thief, too." After the match Williams accused Ramos of sexism by claiming that men were not penalized in the same manner for the same conduct she was accused of. While Williams' claim was backed by the WTA and Billie Jean King, Williams' behavior was criticized by the US Open (which issued the $17,000 fine) and the International Tennis Federation (ITF), which also defended Ramos' integrity.

Martina Navratilova provided a complex analysis of the incident, largely critical of Williams' outburst, but not dismissive of the possibility of a general double standard in tennis. Some observers noted that Williams as a player should have been experienced enough not to lose control of her emotions as she was well aware of the potential for a third violation. In pointing out that sexism was not an issue, contemporary top male players have been careful not to abuse officials despite disagreeing with the umpire's assessment of an infraction, and post-match have generally been apologetic for their on-court behavior and accepting of the penalty. Stuart Fraser supported Carlos Ramos as "one of the few umpires not afraid to call a rules violation against the top players when it is due. It is his colleagues who are letting him down with their inaction, which then leads to situations like this in which players feel they are receiving unfair treatment.” There was also criticism that Williams was acting like a diva "bigger than her sport".