Roger Federer, by many, is perceived to be the GOAT, as he continues to dominate the competition, even at 37 years of age.
But Millman doesn't play for the money.
Much has been made of the 23-year-old's career to date.
Millman scores big on the way to the fourth round.
"I think there is a lot more to be done and there is a lot more to be, I mean, explored".
They haven't had a falling out - it's just that in the madness of New York, Ron may not make it to the stadium out in Queens, a traffic jam or a subway train ride from the players' hotels in Manhattan.
The contrast between Kyrgios' mindset and Federer's was not lost on the talented, if temperamental, Australian.
It was another Grand Slam disappointment for Zverev, touted as the youngster most likely to end the major dominance of Federer, Djokovic and Rafael Nadal.
The rant was highlighted by one particular journo who quoted Kyrgios as saying, "I need an umpire to coach".
"He's got an aura about him".
"I wouldn't say I'm satisfied with my career". I think, you know, just the way he goes about things. "But I was not able to be more aggressive than she was". I want to start off at 0-All and not already being behind the 8 Ball. But hold your beer, you have got God on the other side.
"I will relish the opportunity". Their last three meetings had required a third-set tiebreak to decide the victor but this time in NY, it was a rout. "I thought I played very well".
True to form, Kyrgios had already been responsible for some drama in NY this week after being forced to defend himself against claims that an umpire had improperly helped coach him to victory during his second-round match against Pierre-Hugues Herbert.
Meanwhile, Joao Sousa won three tiebreakers in his 7-6 (7-5) 4-6 7-6 (7-4) 7-6 (7-5) victory over 17th-seeded Frenchman Lucas Pouille.
Djokovic was efficient in a 6-2, 6-3, 6-3 victory over No. 26 Richard Gasquet.
Meanwhile, Wimbledon champion Angelique Kerber has been eliminated, leaving none of this year's Grand Slam winners left in the U.S. Open.
Suarez, seeded 30th, will face either former US Open champion Maria Sharapova or former French Open victor Jelena Ostapenko, who capped the Saturday night action on Ashe. Australian Open champion Caroline Wozniacki, the second seed, fell in the second.
Sixth-seeded Caroline Garcia of France also departed, beaten 5-7, 6-4, 7-6 (7/4) by Spain's Carla Suarez Navarro.
Dominika Cibulkova was too strong for Kerber.
"I don't know what anything has to do with Madison and my match".
Federer was 21 when he won his first Slam at Wimbledon in 2003 and admitted he's happy to be regarded as a role model, if not necessarily for Kyrgios. "I have a game to beat her". The thrilling fifth set ended at nearly 2:30 a. m. on Louis Armstrong stadium.
Bertens has had an excellent season and defeated Simona Halep to win the title in Cincinnati two weeks ago.
Kohlschreiber will seek a quarter-final berth against 2014 runner-up Kei Nishikori after the Japanese downed Argentine Diego Schwartzman 6-4, 6-4, 5-7, 6-1.