Conversation so far:
What type of playing style did Bobby Riggs have?
Small in stature, he lacked the overall power of his larger competitors such as Don Budge and Kramer but made up for it with brains, ball control, and speed.
Where did Bobby Riggs learn the ball control and speed play style?
Esther Bartosh had encouraged him to play a so-called “girl’s game”, offsetting “his lack of stature with finesse, guile and tactics”.

Question: Did he have a coach?
Self-contained rewrite: Did Bobby Riggs have a coach as a child?