Thiem, the fourth seed, was leading 3-1 in the third set on Friday when the semi-final was interrupted by rain and then surprisingly abandoned for the day.
The Austrian spent four days in bed with a virus after pulling out of a tournament in Doha last week.
Dominic Thiem, the only player to beat claycourt giant Rafael Nadal on the red dirt this season, is one of the dark horses at the French Open - and the Austrian feels he deserves the tag.
Novak Djokovic ruthlessly took Matteo Berrettini apart at the ATP Finals on Sunday as he began his quest to reclaim the number one ranking by winning his opening group match 6-2, 6-1.
Lewis Hamilton, who started on pole position in Sochi hoping for a 91st Formula One victory to equal Ferrari great Michael Schumacher's all-time record, finished third behind Red Bull's Max Verstappen.
Britain's Jamie Murray and Brazil's Bruno Soares swept the Spanish duo of Pablo Carreno Busta and Guillermo Garcia-Lopez 6-2, 6-3 to win the US Open doubles on Saturday for their second grand slam title of the year.
The cool days of late September, with damp courts expected, will level the playing field and for the first time, other than when Rafael Nadal has been injured, he looks vulnerable on his beloved clay.
Australian Open champion Stanislas Wawrinka crashed to a shock second-round defeat at the Madrid Open on Tuesday when he was upset 1-6, 6-2, 6-4 by qualifier Dominic Thiem.
The two men's quarter-final matches due to be played at the French Open in Paris on Tuesday have been postponed until Wednesday after rain disrupted play at Roland Garros.
A look at the top men's contenders at the 2020 French Open.
IMAGES from the Australian Open matches played on Friday.
Liverpool overcame an early scare and came from a goal down to claim a 3-1 win at Austria's LASK Linz.
Leander Paes and his Czech partner Radek Stepanek stormed into the semifinals of the US Open men's doubles event after getting the better of Julian Knowle of Austria and Slovakia's Filip Polasek in straight sets in New York.
Dominic Thiem will take on Germany's Alexander Zverev in Sunday's US Open final.
Sania Mirza and Rohan Bopanna set up a mixed doubles quarter-final clash against each other at the Australian Open after winning their respective matches, in Melbourne.
Images from Day 1 of the French Open matches played at Roland Garros on Sunday
Images from Day 4 of the 2021 US Open in New York on Thursday.
The Bhupathi-Melzer pair lose in straight sets to Argentine team of Diego Schwartzman and Horacio Zeballos.
Nadal was leading the match 6-1, 2-0 when Correno Busta decided he had had enough.
German Open winner Arvind Bhat and Malaysia Open finalist Sourabh Varma advanced to the pre-quarter-finals of New Zealand Open with straight-game victories in the men's singles of the US $50,000 Grand Prix event in Auckland.
Images from all the action from Day 1 of the French Open played at Roland Garros in Paris on Sunday
Leander Paes crashed out of the men's doubles, while Mahesh Bhupathi and Rohan Bopanna made first round exits from the mixed doubles to sum up a disappointing day for India at the French Open.
Rafael Nadal claimed a record-stretching 12th French Open title by beating Austrian fourth seed Dominic Thiem 6-3, 5-7, 6-1, 6-1 in a repeat of last year's final on Sunday.
Formula One leader Max Verstappen handed his Red Bull team a home pole position for Saturday's sprint race at the Austrian Grand Prix after Mercedes rivals Lewis Hamilton and George Russell crashed in qualifying.
Vijay Sundar Prasanth made it to the main draw joining compatriots Somdev Devvarman and Ramkumar Ramanthan.
Rohan Bopanna reached his first final of the season along with Great Britain's Colin Fleming after outclassing Julian Knowle and Filip Polasek in straight sets at the ATP Open 13, in Marseille.
Leander Paes and Radek Stepanek, seeded fourth, are drawn against Daniele Bracciali of Italy and Jonathan Erlich of Israel in the first round of the men's doubles at Wimbledon, starting Monday.
Defending champion Rafael Nadal failed to win a single game in the opening set of his US Open quarter-final against Dominic Thiem on Tuesday but fought back to beat the Austrian 0-6, 6-4, 7-5, 6-7 (4), 7-6 (5) in match that ended past 2 am in New York.
Roger Federer's bid to win a ninth Halle Open title was ended in the semi-final on Saturday by teenage German Alexander Zverev, who defeated the 17-time Grand Slam champion 7-6(4), 5-7, 6-3.
Former champion Svetlana Kuznetsova recovered from a slow start to beat Romanian teenager Sorana Cirstea 7-6, 6-1 to reach the third round of the U.S. Open on Wednesday.
Top-seeded Serb Ana Ivanovic withdrew from the Qatar Open on Thursday after injuring her left ankle beating Olga Govortsova of Belarus the previous day.
'They're just trying to shove us on the court because we're qualifiers'
Exodus of big guns opens up bottom half of men's draw
A round-up of the fifth day's play at the French Open.
Top seeded duo Leander Paes and Radek Stepanek had to work hard before grinding down unseeded rivals Filip Polasek and Julian Knowle in the opening round of the ATP Japan Open, in Tokyo on Thursday.
The seventh seeded pair of Indian veteran Leander Paes and Austrian Alexander Peya advanced to the French Open second round after notching a three-set victory in their opening men's doubles match at the Roland Garros in Paris. Paes-Peya defeated Italians Simone Bolelli and Fabio Fognini 6-1, 6-7 (2), 6-3 in a contest lasting a little over two hours.
Second seed Novak Djokovic outclassed Roger Federer in straight sets to enter the final of Australian Open in Melbourne on Thursday. Seven-time champion Djokovic started off slowly before he took complete control to register an emphatic 7-6, 6-4, 6-3 victory in the first semi-final.
Only once in 16 previous appearances has Federer not survived the group stage, back in 2008. IMAGES from the ATP Finals played at The O2 Arena in London on Sunday
The Austrian International Sex School in Vienna offers "hands on" lessons in seduction for 1,400 pounds a term.
The world No 1 is certainly buoyed by the prospect of emulating his achievement of holding all four majors but knows that nothing less than perfection will be required.