At the age of 23, Naomi Osaka already has two Australian Open and two US Open titles to her name.
But now comes the really hard bit. Can she win on the clay of Roland Garros, and the grass of Wimbledon, to complete her set of Grand Slam titles?
"Every kid growing up would want to win all four of those," the Japanese player tells BBC Sport in a virtual meeting.
By her own admission, Osaka is still not comfortable on clay. She says she has been scarred by a slip on grass which injured her knee and she has asked five-time Wimbledon champion Novak Djokovic for advice.