Beaten twice by Nadal in the space of a month, in the Barcelona and Madrid Open finals, Thiem took his revenge by handing the 30-year-old Spaniard a first clay court defeat of the season in Rome.
In Sunday's final the Belgian will meet Stefan Koubek, who beat Carlos Moya in the second semi-final at the Chennai Open.
World number one Rafael Nadal suffered a rare second-set meltdown before recovering to beat plucky Slovakian Lukas Lacko and join rival Roger Federer in the Qatar Open quarter-finals on Wednesday.
Andy Murray continued his remarkable run on clay.
Rafael Nadal continued to roll at the Chennai Open, entering the last eight stage of the tournament even as fifth seed Nicolas Mahut and seventh seed Werner Eschauer were shown the door on Thursday.
The bull-like Alcaraz, playing only his second Grand Slam final compared to Djokovic's record 35, put on a show
Both are in superb form and have yet to drop a set at this year's championship. Britain's Murray, the number one seed, will face 28th ranked Fabio Fognini from Italy while Spaniard Nadal will go up against Russian Karen Khachanov, ranked 30.
Can Iga Swiatek challenge Rafael Nadal's French Open record?
Rafael Nadal claimed his first grasscourt title for five years.
World number two Rafael Nadal has a serious problem with his foot which is likely to affect the rest of his career, his uncle and coach Toni Nadal has said
The Serbian showed no mercy against the Spaniard as he cruised to a 6-2, 6-2 victory at the National Tennis Centre to claim the China Open title
Nadal's comments follow media reports this week that Novak Djokovic, the president of the Players' Council, had urged players to unionise at a pre-Australian Open meeting and revolt over the way the revenues from the four grand slams are distributed.
Hurkacz, Swiatek win as Poland march into United Cup final
Rafael Nadal has asked the International Tennis Federation to publish the results of his drug tests following an accusation of doping by a former French cabinet minister.
Fourteen-time grand slam singles tennis champion, Rafael Nadal, will carry Spain's flag at the opening ceremony for this year Olympic Games in Rio de Janeiro, he said on Wednesday.
With a jam-packed schedule brimming with both legendary athletes and captivating storylines, Paris 2024 promises unforgettable moments.
Claycourt king Rafael Nadal marched into his 10th French Open final after demolishing rising Austrian Dominic Thiem 6-3, 6-4, 6-0, while third seed Stan Wawrinka edged past Andy Murray 6-7, 6-3, 5-7, 7-6, 6-1.
Images from Day 4 at the Wimbledon Championships, on Thursday.
IMAGES from Day 6 of the French Open, at Roland Garros, on Friday.
World number one Rafael Nadal begins his French Open title defence, on Monday, with a clash against Italy's Simone Bolelli on Court Philippe-Chatrier.
A summary of sports events and sports persons, who made news on Tuesday
He leads the men's seedings ahead of defending champ Roger Federer, with Bulgarian Grigor Dimitrov seeded third.
The victory earned the American a place in the Pacific Life Open final against Roger Federer.
The Rafael Nadal Tennis Academy, which opened last autumn on the Spanish island of Mallorca, is charging kids 56,000 euros ($62,000) a year for tennis lessons and school.
Jannik Sinner won his maiden Grand Slam title at the Australian Open on Sunday.
French Open champion Rafael Nadal has pulled out of next week's Queen's Club grasscourt tournament, saying he needs more time to recover after winning his 11th Roland Garros title.
'Of course I feel that I can beat Rafa. He is looking good and injury free. But if I didn't think I could win I would not bother going out on the court'
Second seed Rafael Nadal ground down German Philipp Kohlschreiber to win a tough match 7-5 6-3 4-6 6-2 in the Australian Open second round on Thursday.
Roger Federer says he does not regret passing up the chance to topple great rival Rafael Nadal from the top of the world rankings at the ATP Finals in London this week.
Defending champion Naomi Osaka of Japan was upset 7-5, 6-4 by Belinda Bencic in the fourth round at the US Open on Monday as the Swiss reached the quarter-finals for the second time.
Alcaraz will hope to bury memories of an injury-plagued start to last year when he missed the Australian Open
Rafa Nadal's return to form was stopped in its tracks when he lost his opening match at the Aegon Championships to Ukraine's Alexandr Dolgopolov 6-3, 6-7(6), 6-4 on Tuesday.
The world number two acknowledges it may be some time before he can return to the level he reached last year
Predicting Rafael Nadal's downfall as he prepares to try and win a record-extending 10th French Open title is disrespectful to the Spaniard, double Roland Garros champion Maria Sharapova said on Friday.
'The sport is so physical, especially the way he plays, but brings an optimistic perspective on his work that he can come back and be a champion. He is extremely motivated'
No matter where Rafael Nadal goes at Queen's Club, there seems to be no hiding place for the popular Spaniard.
Rafael Nadal's day-glo outfit and his ferocious forehands lit up a gloomy Queen's Club on Wednesday as the Spaniard marked his return to grass with a 6-2, 6-2 demolition of Brazilian journeyman Marcos Daniel.
World number one Rafa Nadal won a record extending ninth French Open title when he beat Serbian second seed Novak Djokovic 3-6, 7-5, 6-2, 6-4 in Sunday's final.
Spanish Tennis ace Rafael Nadal has dismissed reports that he's romancing pop star Shakira.
...There was more to his win as he made a few variations to his game en route his 16th major