Novak Djokovic of Serbia and John Millman of Australia argue in the second set during their men's singles quarter-final match on Day Ten of the 2018 US Open at the USTA Billie Jean King National Tennis Center on September 5, 2018 in the Flushing neighborhood of the Queens borough of New York City.
Millman, though, also leaves Flushing Meadows a victor and with renewed belief that he can challenge for major spoils following his stirring run to the second week of a grand slam for the first time.
Djokovic said the tournament needs to address the problem of air-conditioning in an arena which can hold nearly 25,000 people.
The hot and humid conditions, which left Federer out of breath, took their toll on Djokovic who looked sluggish early in the second set.
Djokovic, now ranked at number 6, defeated our last remaining hope for an Australian victor 6-3, 6-4, 6-4 in 2 hours and 49 minutes.
Serbian tennis participant Novak Djokovic defeated John Millman and superior to the semifinals of the US Open, Sport24 reported.
He is now even money to be this year's US Open victor and I'm not remotely tempted to press the Cash Out button.
A shirtless Novak Djokovic, of Serbia, smiles during a changeover in a quarterfinal against John Millman, of Australia, at the U.S. Open tennis tournament, Wednesday, Sept. 5, 2018, in NY.
Beforehand recognized tennis participant was named the favorites for the US Open event.
Djokovic was 1/13 on break points when Millman double-faulted on a 14th opportunity at 4-4, volleying the ball away with his foot in annoyance at giving his opponent what he had been unable to take for himself.
On the six-minute break, Djokovic added: "He [Millman] was apologising, actually".
With Millman making headlines in Australia for his stirring fourth-round triumph over Roger Federer, even Rupert and Lachlan Murdoch were on hand on Wednesday night to see what all the fuss was about.
Still in search of her first Grand Slam title, the Keys reached her third semifinal in the past five majors by using her big-strike game built on serves and forehands to overpower No. 30 Carla Suarez Navarro of Spain 6-4, 6-3.
She will face No. 20 Naomi Osaka in Thursday's semifinals.
Osaka celebrated her win calmly and coolly unlike the floods of tears which greeted her last-16 victory over Aryna Sabalenka.
Naomi Osaka, of Japan, reacts after defeating Lesia Tsurenko, of Ukraine, during the quarterfinals of the U.S. Open tennis tournament, Wednesday, Sept. 5, 2018, in NY.
Keys was one of four American women in the final four a year ago, when she was the runner-up to Sloane Stephens.
Millman, who had become the first Aussie to make the quarterfinals since Lleyton Hewitt in 2006, kept the three sets close.
The 31-year-old earned a 6-3 6-4 6-4 victory over the Australian world number 55.
But she will face a stern test from Suarez Navarro, who is brimming with confidence after arriving in NY on the heels of a finals appearance at New Haven.