If there were any doubts about his status in the world of tennis before this calendar year, which there probably weren't, Roger Federer has certainly confirmed he's the greatest of all time after winning the Australian Open in January, and then Wimbledon earlier this month.
Despite last season being absolutely ruined by injury problems, Federer has made a dramatic return to the top of tennis thanks to Grand Slam wins in Australia and England, defeating Rafael Nadal Down Under, and Marin Cilic at SW19.
It looked as though all tennis fans were preparing to say goodbye to the Swiss legend last season, with constant injury problems forcing him to withdraw from minor tournaments, and seeing him exit Grand Slams a lot earlier than previous years.
However, a resurgence is well and truly underway, and the 35-year-old heads into the US Open in final fettle, looking to make it three wins out of four in terms of Grand Slams this year.
Of course, we all know that the French Open went to his long-term rival Nadal.
Now, Federer has been around for many a year now. He's seen a lot of new players come and go, and he's also seen a lot of new introductions come into the sport.
However, the latest new rules are something that he cannot come to terms with.
Two new rules are being introduced to tennis at the US Open for the qualifying, junior, and wheelchair draws, and the Swiss is not impressed with either of them.
On-court coaching and the shot clock are the two new rules in question.
Currently, a tennis player cannot receive any advice from their coach whilst out on the court, however, with the new rules, they will be able to seek help when they are playing on the side of their coach.
As for the shot clock, there will be a 25-second period introduced in the aim of speeding up the play and preventing long pauses in between points.
Speaking about the new rules, Federer said: "I'm not all for it.
"I find it kind of cool that in tennis, you know, you're sort of on your own out there. Not everybody has the same amount of resources for coaching, as well. So I'm not sure if it's that beneficial. But, you know, might be interesting for some people to see.
"I know that some parts of the world, coaching at junior level and all that stuff is totally normal, that the coaches and the players speak.
"I'm sure it's not going to make that much of a difference because I'm sure there's hand signs going on as we speak.
"It doesn't take much to understand that message. I'm not really for it."
With regards to the shot clock, he added: "The shot clock is an interesting one, but how do you judge, when you finish after a drop shot, it's been a tough rally, the guy has to run back to the baseline."
"Sometimes we need to have some leeway. But I do believe we should enforce the rule at some stage, somehow, because maybe too many players have gone over the limit. That's where we are now. I'm not sure if it's good, but give it a try, I guess."
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