I’m not sure I like the scenario you’re proposing but yeah, it is plausible.Yeah you make a good point about the yips though. Is it any coincidence that the second Djokovic’s serve started to faulter and Zverev got break points, Zverev’s own service games improved? With him if he feels he can get into the opponent’s service games it puts less pressure on himself to hold.
Against a guy like Khachanov who has such a big serve+1 combo Zverev is going to be under a lot of pressure to hold his serve— and that leads to Zverev DFing and beating himself usually. Interested to see what happens