Despite getting the rough side of the schedule, however, Thiem says fatigue will not be a factor as he attempts to claim his first Grand Slam title.
Thiem, meanwhile, will be the one facing Rafael Nadal in the final for a second straight season.
Asked why he can join Robin Soderling and Djokovic as the only men to get the better of Nadal at Roland Garros since the Spaniard won his first title in 2005, Thiem said: "I don't know yet, because I never beat him here on this court. I guess they know tennis better".More news: Chris Pratt & Katherine Schwarzenegger Are Married!
Though Djokovic holds a 28-26 career advantage over Nadal, Thiem may pose the bigger challenge to Nadal, who is seeking an 18th major that would nudge him closer to Roger Federer's record 20.
On the resumption Saturday, Djokovic retrieved the break in the seventh game but slipped behind again in the match when Thiem converted a fourth set point.
Nadal should be more rested for Sunday's match, because Thiem needed two days to complete his five-set, four-hour semifinal victory over Novak Djokovic.
The match had already been suspended early in the third set due to rain on Friday, before resuming on Saturday. It's probably a little bit more hard to play these four hours with all the interruption than if you played in one time.
"[Friday] was one of the worst conditions I have ever been part of".More news: NCR's 'poor' air quality days down by 50% : Prakash Javadekar
Top seed Djokovic had been increasingly frustrated with the conditions on court with high winds kicking up the clay.
"Today and yesterday, of course, was tough. But I try to keep all the positive emotions I'm having from this incredible match today, and go with a really positive mind into the match tomorrow, and then we'll see". A first serve into the body plus an ace fended off two more set points prior to Thiem anticipating Djokovic serving and volleying and crushing a backhand.
Upon the restart, Djokovic constantly pressured Thiem and got his reward to pull to 3-4 in the third.
Thiem failed to take a pair of match points as he displayed nerves behind his serve in game nine.
Thiem double-faulted at 5-5 to gift Djokovic another break of serve and this time the Serbian made it stick to take the match into a deciding set.More news: Penn State Hoops Will Play Wake Forest In Big Ten/ACC Challenge
Thiem saved break point in the first game of the day with a stunning forehand victor to end a rally at 23 shots, before celebrating vigorously after whipping a brilliant forehand down the line to close out.