From her remarkable comeback through qualifiers to triumphant battles against major champions, Yastremska's resilience radiates on the hallowed Rod Laver Arena.
Qualifier Arthur Fery delivered a stunning Australian Open win by beating 20th seed Flavio Cobolli on Sunday.
World number two Gauff clawed her way back from a set down to defeat Russian Veronika Kudermetova 4-6, 7-5, 6-2 in a match that stretched over two and a half hours.
Third-seeded Jessica Pegula and fourth-seeded Jasmine Paolini of Italy were knocked out during second-round play Wednesday on the grass at the Berlin Open.
Michelsen, seeded 26th, will face hard-hitting 11th seed Karen Khachanov of Russia, who upset eighth seed Casper Ruud in their fourth round match 6-4, 7-5.
In the evening session, men's third seed Alexander Zverev and women's fourth seed Jessica Pegula were forced off the court mid-match due to rain and the threat of lightning.
Second seed Coco Gauff overcame early problems on serve to cruise past China's Wang Xinyu 6-3, 6-2, keeping her composure despite eight double faults in the first set to book a meeting with Ukraine's Dayana Yastremska in the third round.
French Open champion Gauff is in line for a clash with fellow American Jessica Pegula.
13 of the men's seeds fell at the first hurdle -- a Wimbledon record since 32 seeds were introduced in 2001.
Defending champion Iga Swiatek crushed Dayana Yastremska 6-0, 6-2 and 2023 champion Elena Rybakina powered past Britain's Katie Boulter 6-0, 7-5 to reach the fourth round of Indian Wells on Sunday in displays of dominance.
Images from Day 7 of the 2025 Australian Open at Melbourne Park on Saturday.
Ukrainian's powerful forehand eventually overcame the 19-year-old Czech, who was the youngest player left in the women's draw.
Dayana Yastremska upset of twice former champion and 18th seed Victoria Azarenka.
Australian Nick Kyrgios came from behind to defeat Mackenzie McDonald 3-6, 6-3, 6-4 in the first round of the Miami Open on Wednesday to earn his first win since October 2022.
The Dutchman collapsed on the court after converting his sixth match-point to end an absorbing three hour, seven minute affair under sunny skies on Stadium One court.
Aryna Sabalenka took a big step towards retaining her Australian Open crown by beating American fourth seed Coco Gauff
Images from Day 5 of the 2025 Australian Open at Melbourne Park on Thursday.
The Indo-American pair of Sania Mirza and Rajeev Ram made a first round exit from the US Open mixed doubles event after losing to Dayana Yastremska from Ukraine and Australia's Max Purcell.
Twice finalist Ruud overcomes Davidovich Fokina test
Italy's Matteo Arnaldi produced a sensational performance to take out sixth seed Andrey Rublev and reach the last 16 of the French Open on Friday.
Images from Day 7 of the 2024 Australian Open in Melbourne on Saturday.
Serena Williams powered into the fourth round of the Australian Open on Saturday with a 6-2, 6-1 demolition of Dayana Yastremska then consoled the Ukrainian teenager after leaving her in tears.
Still wearing a compression sleeve after a recent forearm issue, Carlos Alcaraz produced a stellar show in a rematch of the duo's 2022 encounter to firmly put himself back in the conversation as the favourite to lift the title in Paris and a third major.
Gauff cruises past Zidansek to reach French Open third round
Osaka, the 2019 and 2021 Melbourne Park champion, has not played on the WTA Tour since the Pan Pacific Open in September, where she pulled out of her second-round match against Beatriz Haddad Maia in Tokyo due to illness.
Images from Day 2 of the 2024 Australian Open in Melbourne on Monday.
Gauff survives scare, Osaka advances
Dominic Thiem defeated qualifier Facundo Bagnis of Argentina 6-4, 7-5 in the first round of the Plava Laguna Croatia Open Umag
Maria Sharapova and Andy Murray have pledged to support relief funds for children affected by the invasion.
Manchester City and Everton players took to the field wearing Ukrainian flags before their Premier League game on Saturday while there were anti-war messages at stadiums elsewhere following Russia's invasion of Ukraine.
Naomi Osaka faces Zheng before possible meeting with Coco Gauff
Top-seeded Elina Svitolina of Ukraine, wearing her national colors of blue and yellow, won on "a special night for me," beating Russia's Anastasia Potapova 6-2, 6-1 on Tuesday in the first round of the Abierto GNP Seguros in Monterrey, Mexico.
Poland's red-hot world number one Iga Swiatek did not drop a game in her Saturday singles match against Romania's Andreea Prisacariu, sending Poland through to November's Billie Jean King Cup finals in decisive fashion.
Geopolitical tensions simmered at the US Open on Thursday as Ukrainian Marta Kostyuk refused the customary handshake at the net when Belarusian Victoria Azarenka defeated her 6-2, 6-3 in the second round.
Captain Virat Kohli enjoyed his time off by catching the action at the Australian Open in Melbourne on Saturday along with wife Anushka.
In a rematch of last year's French Open final, Barty prevailed once again, winning 6-3, 6-3 for a 4-0 head-to-head lead over the Czech.
We bring you best images from week one of the 2019 Australian Open Championships at Melbourne Park
Williams, dubbed the Australian Open favourite by Bouchard shortly after the match, is vying for a record-equalling 24th Grand Slam singles title
India's Rohan Bopanna and his Romanian partner Florin Mergea were knocked out of the French Open men's doubles event after being handed a straight-set defeat in the quarterfinals in Paris on Wednesday. Bopanna and Mergea, seeded sixth, went down 4-6 4-6 to third seeds Ivan Dodig of Croatia and Marcelo Melo of Brazil. In a lopsided contest, Bopanna and Mergea struggled to handle Dodig and Melo's fine service game. The Indo-Romanian combine was broken once in the opening set and failed to convert either of the two break points it earned. Bopanna and Mergea also committed a couple of double faults.
COVID-19 Quarantine Victoria also said in a statement that the one case of the virus acquired overseas reported on Sunday was not connected to the tennis Grand Slam.