Who said "The imagination to envision success is half the battle."?

This quote is attributed to Roger Federer.

The imagination to envision success is half the battle. - Roger Federer

"The imagination to envision success is half the battle."

Roger Federer Imagination

Professional Tennis Player Swiss Born 1981 (age 45)

"I appreciate the opportunity to play in front of my home fans"

"Tennis has given me everything"

"The moment of victory is much too brief to live for that and nothing else"

"I still have a few years left, I hope"

"Imagination is more powerful than knowledge."

"The world is full of wonders if you know where to look."

"You have the imagination of a child, Lucy"

"The world is full of mysteries waiting to be solved."