Jelenafan
Multiple Major Winner
Yes but ND is actually better player than 2013, 2014 of which you are basing your comparison to. I suppose winning 4 of their previous five matches vs ND will be a confidence builder for Thiem but if (and it's a big 'If' ) the match turns into a 4 or 5 setter, Thiem will run out of gas having had to play longer matches. For sure i hope he can win but i don't see how especially on that court surface.
Majors normally have a day’s rest between matches, Theim's last 3 matches were 4 sets, 4 sets and 3 sets over Zverev, Nadal and Monfils. If the Zverev and Nadal matches had gone the full 5 sets i think major physical fatigue could be a factor but a 26 year old player who from all acounts is a conditioning freak should be OK.
Mental fatigue is another matter, harder to gauge.