His 11th title French Open deepened a Parisian habit both routine by now and unimaginable by anyone.
Understandably, Thiem looked edgy as the match begun and he managed to win only one of the first eight points as Nadal, cheered loudly when he walked on court, bristled with intent.
He led by two sets plus a break early in the third when the middle finger on his racket-wielding left hand was cramping so badly he couldn't straighten it. "The watch keep going always".
Still, Nadal was able to complete the job on court Philippe-Chatrier. Court claimed the last of her 11 at the Australian Open in 1973.
Ramos is now in Russian Federation with the Spanish squad as they prepare for the World Cup, but took time out to tweet in Spanish, hailing Nadal for his "dynasty on clay", calling him a "tennis legend" and "sporting hero".
Nadal's celebration was restrained ― throwing his arms skywards and turning to his entourage including coach and fellow Mallorcan Carlos Moya and his uncle Toni who stood down a year ago when his nephew Nadal reached La Decima.
The first set had taken 57 minutes, in stiflingly humid conditions, but there was to be no let-up for the underdog in the second. He pounded huge serves that topped 135 miles per hour - about 25 miles per hour better than Nadal's fastest - and translated into seven aces but also had five double faults.
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When asked about eventual normalization of ties, he said: "That is something I would hope to do that when everything is complete". And if I think it won't happen, I'm not going to waste my time .
Sunday's final will be Nadal's 24th Grand Slam final, putting him second all time. At the beginning of 2017, Federer held 17 Slams to Nadal's 14. He lost the first set, then turned things around after a rain delay.
A hold to love showed Thiem had not given up the ghost, however unlikely a repeat of Simona Halep's heroics from the same position a day earlier seemed. He won the first six points and broke for 2-0.
It's been nearly eerie to watch Nadal have such contrasting fortunes on clay-as we saw on Sunday-compared to on grass, with Wimbledon accounting for his worst record in any major over recent years. A few years ago, everyone thought he was done.
Rafael Nadal looks borderline unbeatable at the moment.
Thiem was still on the back foot in the third set, being forced to save four break points in the first game.
That was swatted away with Nadal's double-handed backhand, though, and the second set duly went the way of the favourite.
His lone opportunity of the set indeed vanished.
A well-disguised drop shot served him well at 30-40 down in game three but in opting for power soon afterwards he netted a forehand, affording Nadal another break chance that was gobbled up.