Hi friends

You are on a backhand in defense... You return it, the opponent returns you a relatively short and favorable ball on the backhand: I get into the ball and I attack!! it's victory I win my first Grand Slam title.... (OK... lol I'm going to bed...)
More seriously, here is a typical exercise that allows you to practice a little in this kind of situation:

With the basket of balls, the coach sends us a ball on the backhand at the back of the court.
I'm turning it over... then I'm going to go around the plot
The coach sends me a second, shorter backhand ball that I can attack
I attack the ball with my backhand. Then I'm going to go around the plot

And we repeat the exercises like this

Download this sheet in PDF format

Credit: Image made with: Elouan Tennis Drill Maker  (ETDM) : the software to create your tennis exercise and training sheets