^^^^Yeah the first picture I drew the triangles were a little larger which incorporated more shots. But the point isn't that shots necessarily land in the area, but that djokovic was probably aiming for a point within those triangles and missed by a few feet, which of course is usual when trying to hit with so much power.
I think people watch pros, see them hit a shot DTL which lands right on the line, and think they were aiming for that exact result, when in fact they were probably aiming a foot or so inside the line. If you watch pros at exhibition events and they try to hit targets you'll often see them missing by 2-4 feet on easily fed balls, so you can imagine the error margin when they're trying to run a tough shot down and then pass their opponent charging the net.
Yonex RDiS 100 Midplus, Tourna Poly Big Hitter Silver 17 @ 54lbs.