Stauffer on influence of Federer's wife Mirka: 'For me she is the Mona Lisa of Tennis'

Meaning that everyone knows her but no-one has ever heard her speak but that despite that every magazine and talk show would love to have her.

Despite that, not only has Mirka had an influence on Roger but vice versa as he has been 'tremendous' since they first met.

"For me Mirka Federer is the Monna Lisa of tennis. Everyone sees her behind the window but no one ever heard the sound of her voice.

She does not speak and she does not have social media channels. Twitter and Instagram either... However all the biggest magazines or shows would like to have her."

"She was so motivated that if her coach asked her to run a marathon before the Training session, she would have done it.

Roger was surprised by how much she was involved. After an hour, he was bothered!"

"Roger's half of success is thank to Roger. He had a tremendous influence since when they met. If you have a woman who gets tired at some point, you cannot be focused enough on tennis.