$$$ + ZZZ = :-)))

How's that for a Federerian emoji-laden tweet? The Huffington Post queen Arianna Huffington is on a book tour now, promoting a new tome called “The Sleep Revolution” that's (shocker) all about sleep.

On said tour, she has noted that Roger Federer greatly values his nighttime rest, and even sleeps apart from his family at Wimbledon. One wonders if the arguable GOAT has lost any sleep over recently surrendering the all-time money-leader title to Novak Djokovic (Answer: unlikely). Even so, what we have here are two rivals on the verge of $100 million in career on-court winnings.

Be that as it may, the two have played into drastically different narratives of late. John Isner outed Federer as a World Wrestling Entertainment fan recently in a piece for The Players’ Tribune. Meanwhile, Djokovic remains attached to the Indian Wells-originating dust-up about equal prize money between the men's and women's tours, most recently a talking point during Charleston media-hour sessions with equal-pay ambassador Venus Williams and Andrea Petkovic.

"It's important for men to get on board," Venus says of equal pay in sports, and in life. "Men have daughters, wives, sisters."

Indeed, they do. They just don't always sleep in the same house as them. And sometimes that's good for the entire family.

Follow Jon on Twitter @jonscott9.