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.
Kazahk Bublik powers past Zverev in straight sets to reach Halle final
Fourth seed Grigor Dimitrov survived a scare against Pierre-Hugues Herbert before holding his nerve to win 3-6, 6-2, 6-4 in the second round of the Monte Carlo Masters on Tuesday, while Dominic Thiem edged out Russian youngster Andrey Rublev.
Rafael Nadal put in some late-night overtime to drag hosts Spain into the Davis Cup semi-finals but Novak Djokovic's hopes were dashed in excruciating fashion as Serbia bowed out on Friday.
World number one Novak Djokovic began his quest for a sixth title at the season-ending ATP Finals with a 7-6(4), 6-2 victory over Norway's Casper Ruud in their round robin encounter in Turin on Monday.
Novak Djokovic's father Srdjan said on Friday he would not attend his son's Australian Open semi-final and would instead "watch from home".
Auger-Aliassime was a step up for Federer who was far from his best in an error-strewn display.
Nick Kyrgios produced a serve-and-volley masterclass to topple world number one Daniil Medvedev 6-7(2), 6-4, 6-2 for his eighth straight win on a day of upsets, while American Tommy Paul rallied to beat Spanish second seed Carlos Alcaraz.
After a mature performance against ninth seed David Goffin, the 19-year-old set up an intriguing last-eight showdown with world number one Rafael Nadal.
World number two Nadal's fate will rest on his final group match against Tsitsipas.
Frances Tiafoe is the first American man to make a US Open semi-final since Andy Roddick in 2006.
In the ongoing Monte Carlo Masters, Jannik Sinner clinched a hard-fought win as Casper Ruud crashed out.
Grigor Dimitrov dispatched American 10th seed Frances Tiafoe in straight sets with a convincing 6-2 6-3 6-2 victory on Sunday.
Wimbledon will allow Russian and Belarusian players to compete at the grasscourt Grand Slam as 'neutrals' this year.
Indian Wells champions Carlos Alcaraz and Elena Rybakina stayed on course to complete the 'Sunshine Double' at the Miami Open.
Canada's Bianca Andreescu upset Greek seventh seed Maria Sakkari to reach the last 32, while Japan's Taro Daniel crushed world number 15 Alexander Zverev.
World number one Carlos Alcaraz sailed into the Paris Masters third round with a 6-4, 6-4 win over Yoshihito Nishioka but Rafael Nadal and Daniil Medvedev both slumped to surprise losses on Wednesday.
A summary of Wednesday's action at the US Open.
IMAGES from the Australian Open matches played on Wednesday.
Novak Djokovic has pulled out of the Serbia team for the ATP Cup in Sydney, event organisers said on Wednesday, raising further doubts over whether the world number one will defend his Australian Open title next month.
Images from Day 4 of the 2023 Wimbledon Championships.
There was just gut-wrenching despair as Serbia's hopes slipped away in the cruellest fashion imaginable.
Novak Djokovic is bidding to win the title for the first time since 2015 and equal Roger Federer's six.
Earlier, Ukraine took a 2-0 lead over Japan as world number five Elina Svitolina took the first point of the Billie Jean King Cup era.
Greek third seed Stefanos Tsitsipas battled back from a set down to beat Serbia's Filip Krajinovic 3-6, 6-4, 6-4 in the quarter-finals of the Swiss Indoor championship on Friday. The win took Tsitsipas into his 10th semi-final of the season where he will face top seed Roger Federer, who was handed a walkover after Swiss compatriot Stan Wawrinka withdrew before their quarter-final with a back issue.
Marin Cilic beat Roberto Bautista Agut in straight sets to win a second successive Kremlin Cup in Moscow on Sunday.
'Rarely did I feel my best on clay in the first or second tournament in the season. That was the case this season again. It took me two tournaments to really feel that I'm getting closer to the desired level.'
Earlier in the day, Croatia's Borna Coric said he has tested positive for coronavirus. He became the second player to test positive for COVID-19 after Bulgaria's Grigor Dimitrov.
Defending champion Novak Djokovic and Rafael Nadal will clash for the Italian Open title after the top two seeds advanced to the final of the Masters tournament on Saturday.
IMAGES from Day 10 of the Australian Open in Melbourne on Tuesday.
IMAGES from Day 1 of all the action from the Wimbledon Championships played at the All England Lawn Tennis and Croquet Club, London, on Monday.
A round-up of all the tennis action from around the globe.
Zverev is also in fine form, having beaten world number one Novak Djokovic on his way to claiming the Olympic gold medal in Tokyo at the start of the month.
Homeland favorite Ashleigh Barty and Serbia's Novak Djokovic are the top seeds for the upcoming Australian Open.
Djokovic will need to win in Tokyo and then the US Open later this year to achieve the feat that has so far only been accomplished by Steffi Graf in 1988.
The ATP Finals, in its 50th edition, is being staged in London's O2 Arena for the 12th and last time before it moves to Turin and sadly plans for a vibrant farewell party in front of the usual sell-out crowds has been scuppered by the COVID-19 pandemic.
Rafael Nadal's hopes of winning the year-ending ATP Finals for the first time live on after the Spaniard beat defending champion Stefanos Tsitsipas 6-4, 4-6, 6-2 on Thursday.
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.
This year's Australian Open will be allowed to admit up to 30,000 fans a day, around 50% of usual capacity, amid the COVID-19 pandemic.
Giovanni Bartocci stood outside Billie Jean King National Tennis Center on Saturday shouting encouragement - and eventually employing a microphone and loudspeaker - as the Italian dismantled opponent Casper Ruud in straight sets on Court 17.
