37-year-old man – Roger Federer is always incredibly generous with the time he gives to the media but there is still an air of mystery around the world No 6.
Little is known about what goes on behind closed doors as Federer raises his two sets of twins.
That is exactly how Federer likes to keep his house in order, as Swiss journalist Simon Graf, who released a new book on the 20-time Grand Slam winner last October, has revealed.
Apparently, Mirka is one of three people Federer has imposed strict regulations upon.
“He suggested to her over 10 years ago. Roger likes to keep control, he does not want everyone in the team talking,” Graf told tennisnet.com.
“Physio Daniel Troxler does not speak, [Coach] Ivan Ljubicic does not, Mirka does not speak either.
“Severin Lüthi [Federer’s long-time head coach] speaks, I think that’s good too.
“Because he is always underestimated. By now people know what he understands about tennis, that he is an important figure for Roger.
“Otherwise: Roger speaks a lot, so he makes up for everything. But he also does not want to reveal private details.”
Roger and Mirka have been married for a decade after originally meeting at the 2000 Olympic Games in Sydney.
However, Mirka does not have a social media account and has not spoken to the press since she gave up her own tennis career.
“He made his way very straightforward and made tough decisions along the way,” Graf added.
“He just wants to know very well what’s going on… Federer is always very nice, but he is not one who always wants to please everyone.”