The Serbian had to save two set points in the first set before finding his groove to reach his 10th title clash in Rome and remain on course to win his 36th ATP Masters 1000 crown and overtake Rafael Nadal on the all-time list.
World No 1 Novak Djokovic maintained his perfect tournament record and advanced to his fifth China Open final with a 6-3, 6-4 victory against Andy Murray on Saturday.
Veteran Leander Paes brushed off the disappointment of Rio Olympics as he and his German partner Andre Begemann made it to the final of the ATP Winston-Salem Open beating Swede Robert Lindstedt and Pakistan's Aisam-ul Haq Qureshi in a close encounter.
Defending champion Andy Murray and ATP finals hopefuls Mikhail Youzhny and Fernando Verdasco all made surprise early exits from the Valencia Open on Wednesday. World number four and top seed Murray fell 6-2, 3-6, 6-2 to Argentine Juan Monaco in the second round, while world number 10 Youzhny pulled out at the start of the day with a back problem.
'To win a medal, the players will have to play a couple of tough rounds. The draws are fine, and balanced and give us the opportunity to go deep.'
The 18-year-old Rune broke world number three Zverev four times in a flawless performance for his first win over a player in the ATP top-10
Wawrinka splits with long-time coach Norman
Former world number one Rafa Nadal wasted a match point as he slipped to a surprise semi-final loss to Austrian Dominic Thiem on his beloved clay at the Argentina Open on Saturday.
World No 1 Novak Djokovic ended Kei Nishikori's impressive debut at the ATP World Tour Finals with a 6-1, 3-6, 6-0 semi-final victory at the O2 Arena on Saturday.
Roger Ferdrer came up with a solid all-round display to beat world No 1 Rafael Nadal 6-4, 6-3 in the final and win the Shanghai Masters on Sunday.
The American was forced to default his semi-final match against Kenneth Carlsen because of an ankle injury
Earlier, title holder Borna Coric beat American Sebastian Korda 7-6 (5), 6-4, while another home hope Taylor Fritz survived a first-set thriller to beat Czech Jiri Lehecka 7-6 (14), 6-2.
While Federer and Nadal will look to reignite the flair and fight they showed to reach last year's final, 2018 could have a different script at play.
IMAGES from Day 9 of the US Open, at the USTA Billie Jean King National Tennis Center, Flushing Meadows, New York.
Spain's Marcel Granollers-Pujol upset top seed James Blake to claim the US Men's Clay Court Championship and his first ATP title.
Nick Kyrgios was given a warning for taking too long to return Tsitsipas's serve
Andy Murray saved five match points to defeat Jiri Lehecka at the Qatar Open on Friday and reach a first ATP Tour final since June last year.
Medvedev's deep groundstrokes have been a major component of his clay-court progression. His baseline retrieving has been the foundation of his hard-court success, and he attributed his success on the clay this year to a string change at the start of the 2023 season.
To mark 20 years of Ivanisevic's win, the ATP tweeted, his road to victory.
Murray was coached by Lendl from 2011-14 before he rejoined his team in June last year, helping Murray capture his second Wimbledon title and his second Olympic gold in Rio.
Battle-scarred Argentine Juan Martin del Potro clinched his 21st career title with a 6-4, 6-4 win over Kevin Anderson in the Mexican Open final in Acapulco on Sunday.
'Of course, you don't wish this on anyone. You want these terrible things to be able to finish as fast as possible for all the people in the world to have a chance to have a good life.'
India's Leander Paes and Canada's Daniel Nestor have lost to Andreas Seppi and Fabio Fognini of Italy 3-6, 7-5, 10-8 in their semi-final of the ATP China Open tournament in Beijing.
The second seeds cruised through the second set after a tense opener
Zverev has not lost to Wawrinka in two previous meetings but is not taking the 2014 Melbourne Park champion lightly.
Rohan Bopanna and Florin Mergea finished second in Ashe/Smith Group after losing to the Italian pair of Fabio Fognini and Simone Bolleli in their last group match in the ATP World Tour Finals , at the O2 Arena, in London, on Thursday.
Zverev had surgery on torn ligaments in his right ankle this month after he was forced to retire from his French Open semi-final against Rafael Nadal.
Melbourne man McNamara won five singles titles and 19 in doubles and teamed up with compatriot Paul McNamee to win the Australian Open doubles in 1979 and Wimbledon twice in 1980 and 1982.
Somdev Devvarman registered the biggest win of his fledgling career when the wiry Indian upstaged sixth seeded Marin Cilic in straight sets in the second round of the USD 1.4 million Legg Mason Tennis Classic in Washington.
Novak Djokovic reached the Paris Masters final for the sixth time
Serbia have been drawn in Group B alongside Spain, South Korea and Canada.
The ATP issued the latest men's tennis rankings on Monday and the top 10 list remains unchanged with Serbian tennis ace Novak Djokovic still leading the rankings.
Divij Sharan and Purav Raja shocked top seeded Colombians Juan Sebastian Cabal and Robert Farah to breeze into the summit clash of the ATP Claro Open, in Bogota, Colombia.
Tim Henman is determined to bury the disappointments of 2005 and begin the new tennis season on a confident note.
'It's pretty amazing to get the call from the Spanish king'
The Serbian top seed won a fourth successive title at the All England Club to take his overall Grand Slam tally to 21.
Japan's Kei Nishikori made a stunning start to what will surely be the first of many appearances at the ATP World Tour Finals with a 6-4, 6-4 win over home favourite Andy Murray on Sunday.
That is Murray's 46th ATP title.
India's Rohan Bopanna and Ramkumar Ramanathan registered a resounding straight-set win to cruise into the doubles semi-finals but it was the end of the road for compatriot Sania Mirza and her Ukrainian partner Nadiia Kichenok, in Adelaide, on Friday.