What is the most logical next event?

. a man in a red shirt at an outdoor tennis court

+ of some sort throws a ball at a yellow ball, the yellow ball rolls into the net and the man and woman run to retrieve the ball..
+ says something to the camera and does some hand motions at the black object on the court..
+ is giving a tutorial on to return a serve and how to hold the racket..
+ does volley tennis and serves the ball..
is giving a tutorial on to return a serve and how to hold the racket.