NEW YORK—Novak Djokovic gets asked about Rafael Nadal and Roger Federer a lot. Before Federer's shocking loss to John Millman, Djokovic was expecting to face the Swiss in the US Open quarterfinals.

The 13-time Grand Slam champion has a winning record against both Nadal and Federer. He had a lot to say about his two esteemed colleagues, and even admitted to being "glued to the TV" when Strokes of Genius was on, a Tennis Channel documentary about the 2008 Wimbledon final.

"I really feel like their rivalry is really special because of the contrast of styles, just what they brought," Djokovic said. "I think I'm still under the impression of the Strokes of Genius I watched a couple days ago, that was really cool. I saw that. I was glued to TV, watching Rafa and Roger, that kind of documentary—really celebrating the greatness that they really are."

Somehow, in 38 career meetings, Federer and Nadal have never played each other at the US Open. They were on opposite sides of the draw, and so could have only had their first showdown in the final. Djokovic could have certainly been the man to stop it before Millman got there first. 

"Now through the documentary, I could actually understand how good that [Wimbledon final] was," Djokovic said. "John McEnroe said it's the best tennis match he has ever witnessed. So, I mean, I really did enjoy it. My wife and I were glued to the TV."

Djokovic will face Millman on Thursday. He beat the Australian handily at Queen's Club earlier this summer. 

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