Proceeds from the four-time Slam champions book will be donated Osaka's foundation, which supports girls in sport.
The Uncle of Rafa still believes that Rafa has plenty of tennis left in him.
The American just barely made it to Tokyo to earn his first Rakuten Open win
The 2019 US Open champion will play San Diego Open qualifying this weekend.
The American, who retired from singles in 2017, had been number two in the rankings for much of the year.
The Aussie's hearing will be heard on February 3rd.
World No. 1 and second-ranked Rafa Nadal make Spanish history.
