Nadal, currently No 1 in the ATP rankings, and Djokovic, who is No 2 ahead of Federer, each took home two major trophies last season.

Djokovic won the Australian Open (beating Nadal in the final) and Wimbledon (beating Federer in the final after saving two championship points).

Nadal won at Roland Garros (beating Federer in the semifinals) and the US Open (facing neither of the other two).

"I always say the same: I would love to be the one who wins more,"Nadal said, "but I am not thinking (about it) and I'm not going to practice every day for it."

After his seventh championship in Australia a year ago, Djokovic said:"I do want to definitely focus myself on continuing to improve my game and maintaining the overall well-being that I have－mental, physical, emotional－so I would be able to compete at such a high level for the years to come, and have a shot at eventually getting closer to Roger's record."

Federer's most recent Grand Slam triumph arrived at Melbourne Park in 2018.

He is 38, an age at which no one has won a Slam title in the professional era; he doesn't feel compelled to quit anytime soon. Still, time is certainly on the side of Nadal, 33, and Djokovic, 32.

"I honestly think it's going to be quite exciting to see how much longer can they go. How much more can they win? They might have some more incredible years ahead of them. That's my assumption," Federer said."It's a bit of a golden time for tennis right now, no doubt."

Also of particular interest is when a new face will emerge from the crop of 20-somethings who have been rising in the rankings. There hasn't been a first-time male champ at a major since 2014.

Ask Federer to name names, and he offers several, calling them "that whole group of guys".

Among those he mentioned were Felix Auger-Aliassime, Denis Shapovalov, Stefanos Tsitsipas－who upset Federer at the Australian Open last year－Alexander Zverev, Daniil Medvedev and Karen Khachanov.

"It's an elite group of 10 now, which is nice. It's not just maybe one or two that we thought were pretty good,"Federer said. "So I think it's changed a little bit in the last, sort of, 18 months. It's just really, really hard to predict who's going to win."

Here's something Federer is certain of, though: One day, someone will come along and accumulate majors the way no one ever had until he, Nadal and Djokovic rewrote the record book.

"It's going to happen, inevitably,"Federer said, shaking his head."And it's almost not going to be that hard, maybe, anymore, later on, for some reason, I just feel like, because the players will have seen what we did. And they didn't see just one guy doing it, once every 30 years. They saw like three guys doing it, in the shortest period of time, right after 'Pistol' (Sampras).

"So I just think players are going to believe more. I think maybe the surfaces in some ways also allow you, maybe, if you're on a hot streak, just to run through more years of domination, like what Novak, Rafa and me, we've all done."

Impossible to know who, though. Or when. After all, Federer never saw the magnitude of his own success－or those of his rivals－coming.

"I didn't predict I was going to have this many majors. I was hoping to maybe have one, to be quite honest, at the very beginning of my career. When I played Novak, I thought, 'Yeah, he's good. He might win a major.' You know? 'Rafa, he's probably going to win the French. Maybe once. Or a few times.' But you don't go 12 times there. Or, you know, streaks of not having lost matches on hard or clay for, I don't know, nine months. It's just stuff that eventually builds," he said. "So, hard to tell, but there's a group of guys that I see now probably winning at least, like, four or five majors－which then can lead to 15 or more, of course."

AP via Xinhua