Precisely general hercules.
But if I don't see him doing it in practice, how is he going to do it in match play? I see what he does in practice. He hits 3, 4, maybe 5 backhands and then dumps one into the net or sails one wide. Then he goes back to running around it.
Toni should have two players or even a ball machine hitting to his backhand for as long as it takes each day.
What is as long as it takes?
Don't let him leave the practice court until he has hit 40 or 50 backhands in a row without missing, 75% cross court, 25% down the line.
Then he can take the center of the court without fear and stop giving up so much territory. The man is getting older in terms of mileage. He needs to play smarter as he gets older. If he can't get off the baseline and come to the net to save energy, then he needs to position himself optimally on the baseline.
Watch this epic 80+ stroke rally at the 1978 Roland Garros final between Bjorn Borg and Guillermo Vilas.
I rarely see Borg put himself out of position and he was very fast on the court. Vilas also. These are a couple of the greatest clay court players in history.
Respectfully,
masterclass