Objects in the image:
category: person
category: person
category: tennis racket
category: person
category: person
category: person
category: sports ball

Guessing-game dialogue about one of the objects:
q: is it a person?
a: Yes
q: is it the player?
a: No
q: the ball boy on the court to his left?
a: No
q: the guy behind him in white and blue tshirt?
a: Yes