Christophe Jean claims to have a contract with the father of Naomi Osaka and is seeking big money.
Naomi Osaka on key to clicking with her new coach.
The 16-year-old defeated Naomi Osaka's older sister Mari on Thursday in Miami.
Three-time Miami champion on how family values shaped her.
One man Roger Federer most wants to avoid.
The World No.5 will channel some of her energy into helping children change their lives.
The Russian is one of a growing number of players to wear Lacoste and play with Tecnifibre.
