The victory over the 19-times Grand Slam champion was the second ATP World Tour Masters 1000 title of the season for the 20-year-old German, who also beat Novak Djokovic in Rome.
Tennis's flagship team events the Davis Cup and Fed Cup Finals have been postponed until 2021 because of the COVID-19 pandemic, the International Tennis Federation (ITF) said on Friday. Professional tennis has been suspended since March and will not return until August.
Thiem had already sealed a place in the semi-finals after group wins against Roger Federer and Novak Djokovic, while Berrettini could not progress.
The Citi Open in Washington, which was scheduled to restart the men's ATP Tour after the COVID-19 shutdown, has been cancelled for 2020, organisers announced on Tuesday. The tournament was set to begin on August 14 and serve as a build-up for the US Open but the organisers said concerns about travel restrictions and recent trends in the coronavirus outbreak had led to the decision to scrap the event.
Top seed Kei Nishikori of Japan became the first player to win three consecutive Memphis Open tennis tournament titles when he prevailed in straight sets on Sunday.
'There is so much excitement brewing about Wednesday's Alcaraz and Rune quarter-finals showdown -- it could well be a juicy foretaste of things to come.'
Ramkumar battled past Italian qualifier Andrea Arnaboldi 6-2, 5-7, 6-4 in the semi-finals of the US $75,000 clay court event after two hours and 34 minutes.
Kazahk Bublik powers past Zverev in straight sets to reach Halle final
IMAGES from Day 5 of the French Open at Roland Garros in Paris on Thursday.
It's a historical tie, we will benefit from India team's visit: Pakistan tennis fraternity
Marin Cilic beat unseeded German Michael Berrer 6-4, 6-7, 6-3 on Sunday to win the Zagreb Indoors tournament for the second successive year and clinch his fifth career title.
Marcin Matkowski and Mariusz Fyrstenberg beat fourth seeds Mahesh Bhupathi and Mark Knowles 6-4, 6-2 in the final of the Madrid Masters.
Switzerland's challenge at the ATP World Tour Finals melted away like an Alpine glacier in a heatwave on Sunday as Rafa Nadal and Novak Djokovic marched on to the grand finale.
Just as against Swiss 20-time Grand Slam champion Federer in Saturday's semi-final, the 21-year-old produced a dashing display of power and guile to stun the in-form Djokovic 6-4, 6-3.
Djokovic's challenger will be a 22-year-old who is bidding to become the first Greek to win a singles major.
Nadal, bidding for a record-extending 14th French Open title, won the first five games of the match as he looked on course to repeat his drubbing of the Serb in last year's final.
World number one Carlos Alcaraz marked his return to action following his Wimbledon triumph with a battling 4-6, 6-4 (10-8) win over David Goffin in their Hopman Cup clash on Friday but could not prevent Spain from losing 2-1 to Belgium.
Simona Halep will take over as the new number one in the WTA world rankings after progressing to the China Open final with a dominant 6-2 6-4 victory over Latvia's Jelena Ostapenko in Beijing on Saturday.
Unheralded Igor Kunitsyn upset former world number one Marat Safin 7-6, 6-7, 6-3 in an all-Russian Kremlin Cup final to clinch his maiden title.
The former world No.1 doubles pair upset fourth seeds Mark Knowles of Bahamas and Daniel Nestor of Canada in the semi-finals of the ATP Masters.
18-year-old Carlos Alcaraz earned his first ATP Masters 1000 crown
Matteo Berrettini won the Stuttgart Open for a second time after he beat Andy Murray 6-4, 5-7, 6-3 on Sunday to deny the Scot what would have been his first title on grass in six years.
Rohan Bopanna and Aisam-ul-haq Qureshi missed out on capturing their second ATP title of the season after losing the fiercely fought final of the St. Petersburg Open to Daniele Bracciali and Starace Potito, at St.Petersburg.
Leander Paes and Matthew Ebden continued their winning streak, beating Jonathan Erlich and Andrei Vasilevski 6-4, 3-6, 10-7 to enter the doubles final at the $1,62,000 Bengaluru Open ATP Tennis Challenger, in Bengaluru, on Friday.
A summary of sports events and sports persons, who made news on Tuesday
Novak Djokovic will begin his Australian Open title defence against Frenchman Jeremy Chardy, while reigning women's champion Sofia Kenin meets wild card Maddison Inglis, following the draw for the year's first Grand Slam on Friday.
Images from Day 3 of the US Open, at Flushing Meadows, New York.
Roger Federer's late bid to secure his customary place in the season-ending ATP World Tour finals began with a routine opening round win over Adrian Mannarino in his home town tournament in Basel on Monday.
Rafael Nadal is the oldest title winner in the history of the clay-court tournament.
For all his renowned mental strength it was psychological exhaustion that made Rafael Nadal consider skipping the season-ending ATP World Tour finals this year, the 14-times grand slam champion said on Tuesday.
Top seed Janko Tipsarevic of Serbia lived dangerously before making the final with a confident 6-1, 6-4 triumph over qualifier Go Sodea of Japan in the semi-final of the ATP Tour $450,000 Chennai Open Tennis championship on Saturday.
'This has been an emotional week and I want to thank everyone for the outpouring of support.'
Rafael Nadal delved deep into his seemingly inexhaustible reserves of willpower on Saturday to fight off Andy Murray in a three-hour classic and reach the final of the ATP World Tour Finals for the first time.
American Andy Roddick has booked his place at the World Tour Finals with four weeks of the season remaining, the ATP said on Tuesday.
US Open champion Carlos Alcaraz has become the youngest world number one since the ATP rankings began in 1973.
World number one Novak Djokovic overpowered Dennis Novak after Dusan Lajovic battled past Gerald Melzer and Serbia went on to a 3-0 win in their opener against Group F hosts Austria in the Davis Cup Finals in Innsbruck on Friday.
Russian qualifier Daniil Medvedev stunned home favourite Kei Nishikori in Tokyo on Sunday, winning the final of the Japan Open 6-2, 6-4 in just over one hour.
Monfils, 35, reached the last four at the 2008 French Open and repeated the feat eight years later at the 2016 US Open but has never reached a Grand Slam final.
While Djokovic has a firm grip on top spot, there will be a new number two on March 15 in Russian Daniil Medvedev, who will climb one place to his career-best ranking to replace Nadal, who has not played since the Australian Open due to a back injury.
Another Indian pair of N Sriram Balaji and Vishnu Vardhan will also be seen in the semi-finals after their opponents, Gianluca Mager and Emil Ruusuvuori withdrew from the last-eight match due to an injury to the former.