Williams takes on Simona Halep in the women’s final this afternoon at the grand age of 37 years old.
The American can become the oldest major tournament winner of all time and equal Margaret Court’s all-time record of 24 Grand Slam titles.
Meanwhile, Federer is the same age as Williams and he takes on world No 1 Djokovic in the men’s final tomorrow.
And he finds it strange that they are still at the top of their respective draws many years after breaking through.
“Yeah, it’s definitely a bit unusual, a bit strange,” Federer said.
“I mean, I hope it’s going to happen again for somebody, to have such a big span between the first final, because we haven’t won yet, still have a way to go.
“But it’s definitely special I think for both of us.
“Serena was even earlier on tour than me because she played the breakthrough earlier. It’s amazing what she’s been able to do.
“Again, she can write history [against Halep]. That’s very, very special for her and the women’s game.
“For me, I don’t know, it’s not something I ever expected.
“Winning that ’03 title was something so surreal that it’s nice to be back in another final. Means really a lot to me.”
However, age has changed one factor for both players as they now cut back their training and rely more on experience.
“I don’t have much energy to go train very much right now,” Federer added.
“Honestly, it’s about recovery, hitting some balls tomorrow, warming up the next day. But it’s more in the tactics.
“I don’t think there’s much I need to do in terms of practice.
“This is like a school: the day of the test you’re not going to read, I don’t know, how many books that day. You don’t have the time anyhow.”