Legend's locker-room letters for Federer

At every Australian Open, Aussie tennis great Ken Rosewall writes a heartfelt letter and leaves it for Roger Federer (pictured) in the players' locker room.

It's just a short note on a single slip of paper in neat handwriting, which 83-year-old Rosewall gives to the doorman.

"I just write a simple half-page," Rosewall told The Australian newspaper on Monday. "Good luck. Hope the family's well. That's the extent of it.

"My accreditation pass doesn't allow me to get into the dressing room. I don't want to invade his privacy or bother him at all, so I just figure I'll write him a note."

He said he had met Federer several times and would like to see more of him, "but obviously his time is pretty well taken care of".

"He's admired by millions of people, including me. He's been winning major championships for a long time," added Rosewall, who won eight Grand Slams.

"Now he's 36 and still doing it. Now he's still carrying himself the way he does. He's done an amazing thing for tennis."