Serena Williams and Roger Federer are both at the end of their said careers, no matter how well they are holding up this season, according to some commentators. Age is said to be a cruel reality for them.

According to USA Today, no matter how great Federer and Williams are playing right now, their time as great athletes are simply going to up very, very soon. No matter how great of a tennis player each of them is, they will not be able to stop time and the elegance and strength they displayed throughout their careers will just vanish from the public's eye. If they do not act soon, they might even lose themselves after their careers pan out.

Based on the opinion piece, "In the chosen sport of Roger Federer and Serena Williams, getting old means showing up to work one day with all your physical vulnerabilities being exposed and your mortality as a great athlete staring you in the face." This is quite depressing but not even that implausible.

Williams and Federer's latest luck at the court is opposite each other. Williams won and suddenly so much nearer to her desired 24th Grand Slam singles title. On the other hand, Federer went to the same court but lost. Many said he could have easily won the match, but aches and pains in his back interfered with how he played. "I fought with what I had and that's it, so it's OK," Federer said after his quarterfinal loss to Grigor Dimitrov.

Regardless of whether they won or lost, the two tennis players are by far the best in what they do. Despite being in their 40s, both Williams and Federer have exhibited unbridled enthusiasm for the sport.

But for an athlete, no matter how well-trained he or she is, this means retirement. Williams is not immune to pains and aches either, suffering from several health conditions in the past, including some severe back spasms.

While valid, these claims are hardly new and Williams and Federer, seasoned athletes as they are, surely know what is up ahead. Williams need not even worry about what is next if her athletic career pans out. She has a daughter to raise after all, which she currently adores like there's no tomorrow, no matter how busy she is.

She displayed this love at a US Open press conference when asked about her daughter, Alexis Ohanian, who just turned 2.

"She's a little bit loud and obnoxious right now," Williams said. "I'm not sure she should come to the matches." She can envision taking her daughter to one of her matches next year, though. "I'm hoping next year she'll be at an age where she can sit," Williams said. "Maybe I'll start at smaller tournaments and see how she does and then go from there. Also, she's still napping. And so it's hard."