The Olympics match was basically a long 5-setter.
Tight-ish but short 5-setter, surely? It would have broken down into a couple of tiebreaks in sets 3 and 4, and then a medium-length final set, score-wise. And if it had been a 5-setter, it would probably have been less stressful for him than being under pressure not to lose his serve from 4-5 down any time in the next 27 (I think my maths is right) games.
Hmm. Good job he wasn't playing it this year, I'd say, based on his current serving.