Halep reached the Melbourne title match in 2018 but lost a three-set thriller to Caroline Wozniacki. It was the Romanian's third defeat in three Grand Slam finals.
Michelsen had beaten Tsitsipas at the Japan Open last year and the 20-year-old American kept his unbeaten record against Tsitsipas
Rangy 19-year-old Mensik, the 2022 boy's singles finalist at Melbourne Park, sealed the match in style with a searing forehand winner to push the three-times Grand Slam finalist and sixth seed to the exit.
Garbine Muguruza swapped her rackets for crampons and headed to Tanzania with a friend to climb 5,895 metre (19,340 feet) Mount Kilimanjaro, a five-day expedition in which she scaled
At one stage, police deployed pepper spray.
China's Li Na sent a wayward Maria Sharapova crashing out of the Australian Open semi-finals on Thursday and says there will be no repeat of her capitulation to Kim Clijsters in the 2011 Melbourne Park final.
Images from Day 7 of the 2025 Australian Open at Melbourne Park on Saturday.
All the action from Day 4 at the Australian Open on Wednesday
Alcaraz worked on making his serve more potent in the off-season and was thrilled with how it held up against Nishioka.
Sinner unclear about CAS case ahead of Australian Open defence
-French flair topped American firepower as Gael Monfils turned back the clock to dump fourth seed Taylor Fritz out of the Australian Open on Saturday and celebrate his place in the last 16 with a dance on court.
World number six Novak Djokovic has pulled out of Serbia's Davis Cup first-round qualifying tie due to injury.
Osaka, who returned to the tour a year ago after a long maternity break, had shown glimpses of the form that won her four major titles on her run to the final in Auckland.
Comedian Will Ferrell discussed how he plans to beat the heat.
Madison Keys said she would be wary about being too aggressive against Iga Swiatek.
Hady Habib is the first man representing Lebanon to win a singles main draw match at a Grand Slam in the professional era.
Australian Open chief Craig Tiley said on Thursday he expects to see Australian former Wimbledon finalist Nick Kyrgios back in action at Melbourne Park.
'Tomorrow's going to be a challenge, I've never driven this car in the rain.'
The 18-year-old captured the Argentina Open title with a in over home favourite Francisco Cerundolo in the final.
Alexander Zverev cruised past Frenchman Lucas Pouille in straight sets in the first round of the Australian Open on Sunday.
Images from Day 3 of the 2025 Australian Open in Melbourne on Tuesday.
Jannik Sinner set his sights on mastering clay and grass courts to make himself a complete player
Osaka dropped the first set and trailed 4-2 in the second against the tournament qualifier before finding her rhythm in front of a supportive crowd on a sunny day in South Florida.
Madison Keys, 29, is the fourth-oldest first-time Grand Slam champion in the professional era.
Infosys has launched a new array of AI-powered innovations and platforms for the 2025 Australian Open.
Defending champion Novak Djokovic will bid for a record-extending 11th title at Melbourne Park and 25th Grand Slam crown overall.
Images from Day 5 of the 2025 Australian Open at Melbourne Park on Thursday.
Andy Murray says 'definite possibility' he's played his last Australian Open match
Sriram Balaji and Miguel Angel Reyes-Varela were beaten by Portugal's Nuno Borges and Francisco Cabral in the second round.
Flattens Faria in 2nd round to advance in Melbourne
Aryna Sabalenka opened her bid for a third straight Australian Open title with an easy victory over Sloane Stephens on Sunday.
The Serbian's determined performance ensured he became only the second man to win a century of matches at the Parisian Grand Slam
Novak Djokovic said he has recovered from the hamstring injury that forced him out of the Australian Open semi-finals
Defeat was a blow for the 21-year-old Spaniard as the French Open and Wimbledon champion's bid to become the youngest man to complete a career Grand Slam went up in flames, and he was left to digest his third loss to Djokovic on the surface.
Security officials promptly made a human shield around the players as some others dragged the person
Carlos Alcaraz secured his passage into the fourth round of the Australian Open with a 6-2, 6-4, 6-7(3), 6-3 victory over Nuno Borges.
Images from Day 1 of the Australian Open.
Five singles matches were cancelled as persistent rain washed out a large chunk of play on the opening day of the Australian Open on Sunday, disappointing the large crowds that flocked to Melbourne Park.
Halep, who held the WTA year-end top ranking in 2017 and 2018, has not lost a set in her first week at Melbourne Park and was aggressive against Putintseva from the outset.
Three contenders for the women's singles title at the Australian Open.
