Big John is back.
The International Tennis Federation (ITF) has given its backing to Portuguese chair umpire Carlos Ramos.
A clinical Novak Djokovic dismissed Juan Martin Del Potro 6-3 7-6(4) 6-3 to collect his third US Open.
Serena Williams' behaviour in Saturday's US Open final divided the tennis world after she called the chair umpire a "liar" and a "thief" and said he treated her differently than male players.
Naomi Osaka has made history beating Serena Williams to claim Japan's first ever Grand Slam title, but it was Williams' feud with the umpire that has stolen the spotlight.
A weary and wounded Rafael Nadal has retired from his US Open semi-final while trailing Juan Martin del Potro.
Serena Williams swept past Anastasija Sevastova 6-3 6-0 and into the final of the US Open to sit one win away from a record-equalling 24th Grand Slam title.
It was a historic day for Japan at the US Open as Kei Nishikori and Naomi Osaka became the first Japanese man and woman to reach the semi-finals of the same grand slam.
Defending champion Rafael Nadal has fought back to beat Austrian Dominic Thiem in their US Open quarterfinal match, which ended after 2am in New York.
Defending US Open champion Sloane Stephens has been dumped out in the quarterfinals by Latvian 19th seed Anastasija Sevastova.
Unseeded Australian John Millman has turned the US Open upside down with a colossal fourth-round upset win over 20-times grand slam champion Roger Federer.
Novak Djokovic sweated his way to a fourth round win over Portugal's Joao Sousa at the heat US Open, setting up a potential quarter-final with second seed Roger Federer.
Top seed Rafael Nadal set up an intriguing quarterfinal showdown with Dominic Thiem after snuffing out Georgia's Nikoloz Basilashvili at the US Open.
Fourth seed Angelique Kerber's bid for consecutive Grand Slam titles ended when 29th seed Dominika Cibulkova defeated the German in the US. Open third round.
Roger Federer handed Nick Kyrgios a 6-4 6-1 7-5 tennis masterclass by storming into the fourth round of the US Open.
Rafael Nadal has feasted on Russian opposition in the past but Karen Khachanov nearly served up a major US Open upset.