It was a landmark Saturday at Melbourne Park as Simona Halep and Lauren Davis equalled the record for the longest match in Australian Open women's singles history.
Top seed Halep came from a set down to prevail 4-6 6-4 15-13, the 48 games matching the previous mark reached by Chanda Rubin and Arantxa Sanchez Vicario in 1996.
Angelique Kerber prevailed against Maria Sharapova in the battle between the only two grand slam winners left in the draw, while Karolina Pliskova and Carolina Garcia also made it to the fourth round after respective wins over Lucie Safarova and Aliaksandra Sasnovich.
Pliskova will face fellow Czech Barbora Strycova, who ousted Bernarda Pera 6-2 6-2, while Garcia's next opponent is Madison Keys after the American's 6-3 6-4 success over Ana Bogdan.
Not since Chris O'Neil in 1978 has the Australian Open produced a home female winner, and the wait goes on after Ashleigh Barty was knocked out in straight sets by Naomi Osaka.
HALEP'S ANKLE REMAINS A CONCERN AFTER EPIC
The Romanian rolled her left ankle during her first-round win over Destanee Aiava, and the problem will hardly have been helped by her marathon encounter with Davis.
Halep saved three match points at 10-11 0-40, but recovered to hold before securing a break in game 27, eventually getting across the line after three hours and 45 minutes of gripping action.
"It's sore. I felt the pain. It's not recovered," Halep said of the ankle.
"It's impossible to recover after. After this match I think tomorrow is gonna be worse, but I just push, push myself, and we will see what's gonna happen."
She's known as one of the hardest working players in the world and today was no different...— #AusOpen (@AustralianOpen) January 20, 2018
Per @TennisAusGIG, @Simona_Halep expended as much energy in her match against Lauren Davis as eating 18 bananas#AusOpen pic.twitter.com/wYCtJQiCuE
OSAKA NEXT UP FOR HALEP
The wait for a home women's champion will extend into a 41st year after Barty went down 6-4 6-2 to the unseeded Osaka.
Ranked 72nd in the world, Osaka's next challenge comes in the form of Halep, and the Japanese joked she was feeling tired just watching the Romanian's gruelling clash with Davis.
"I was sweating more watching that match than I was with my match," said a smiling Osaka. "But, yeah, I've played her twice, and both times it was three sets.
"I had fun both times. I feel like I learned a lot. I feel playing the number one is really an honour. No matter what happens, I'll try my best. I'll just see what happens from there."
"I don't really have that many opportunities to play in front of such a big crowd (with) such a good atmosphere. Ash, she's been playing really well. I feel like I shouldn't get upset if I lose a point because she's one of the best players in the world."@Naomi_Osaka_ #AusOpen pic.twitter.com/hiSy2c4KlH— #AusOpen (@AustralianOpen) January 20, 2018
EXPERIENCE COULD PROVE KEY FOR KERBER
Having climbed to the top of the rankings after a 2016 that brought glory in Melbourne and at the US Open, Kerber plummeted after failing to build on those triumphs.
The German has started this year well, though, and was a class above 2008 champion Sharapova in a 6-1 6-3 masterclass. She will face Hsieh Su-wei, who knocked out Agnieszka Radwanska 6-2 7-5.
"I'm not looking too much ahead. I just looking from match to match, day by day," said Kerber when asked about being the only major winner left in the draw.
"Tomorrow I have another day off where I will go on court and practice. This is what I'm looking forward to.
"I'm not looking too much at who is in the draw, who is not. I'm just looking at every single match."
Only one former #AusOpen champion remains...— #AusOpen (@AustralianOpen) January 20, 2018
Our 21st seed @AngeliqueKerber continues her impressive run of form to advance to the 4R d 2008 champion Maria #Sharapova 6-1 6-3 in 64mins. pic.twitter.com/ptYpISoGb5
|Giggs: Bale the best Welsh player I´ve seen|
|Ricciardo ends Monaco hoodoo despite mechanical issue|
|Lyon star Fekir denies being close to Liverpool switch|
|Pogba: I learned a lot from Abou Diaby|
|Where next for Real Madrid stars Ronaldo and Bale?|
|Shingler and Hewitt out of Wales tour|
|Kyrgios pulls out of French Open|
|Khan wants to bow out by winning blockbuster Brook fight|
|Is winter coming? Game of Thrones stars descend on Monaco|
|Root urges England´s batsmen to ´find a way´|
|Lovren, Van Dijk absolve Karius of blame|
|We all know where our nipples are - Hansen welcomes tackle trial|
|Rooney would thrive in MLS, says DC United boss|
|Pakistan complete demolition of sorry England|
|Curry, Durant reveal the secret to Thompson´s success|
|Salah will miss World Cup, claims Saudi sports administrator|
|Deschamps marvels at Zidane´s incredible Champions League success|
|FIA satisfied Ferrari ´inside the rules´|
|NSW Origin hopeful Moylan pulls the strings for rampant Sharks|
|Champions League blunders will stay with Karius - Clemence|
|Warriors assuming Iguodala won´t play game seven, Kerr says|
|Lampard confirms Derby talks over vacant managerial position|
|French Open 2018: The science behind Nadal´s clay-court dominance explained|
|Walsh to continue as Bangladesh head coach|
|Bale makes emphatic point after Champions League omission|
|Casemiro: I bet Ronaldo stays at Madrid|
|Brewers pull away for blowout win over Mets|
|Warriors´ outburst sinks Rockets, forces game seven|
|MLS Review: Timbers win sixth straight, Techera scores hat-trick|
|It was like wrestling – Klopp unhappy with Ramos challenge on Salah|
|McKinnon says 49ers aiming to win Super Bowl this season|
|Choo makes history with walk-off home run, Rangers seeking ball|
|Shin-Soo Choo makes history with walk-off home run, Rangers seeking ball|
|Marcelo: I think Cristiano Ronaldo will stay at Real Madrid|
|Miller-Uibo shines as Semenya sets record in Eugene|
|Rose extends lead as Spieth slides|
|Prompt recovery, Salah – Ramos wishes Liverpool star well|
|Indians reliever Miller headed back to disabled list|
|Warriors´ Iguodala to miss game six against Rockets|
|I shouldn´t have done it – Ronaldo accepts future comments mistimed|
|Klopp: Liverpool behind Karius after Champions League horror show|
|Karius´ final blunders could destroy his career – Kahn|
|Zidane understands Bale frustration|
|Bale, Karius send Twitter into overdrive in action-packed Champions League final|
|Ronaldo: It should be called the CR7 Champions League|
|Zidane revels in Madrid´s third successive Champions League title|
|I lost Liverpool the game – Karius apologises for Champions League errors|
|Barcelona congratulate Champions League winners Real Madrid|
|Salah injury update: Egyptian FA calm World Cup fears|
|Ronaldo must stay with Madrid - Zidane|
|Champions League final player ratings: Bale stars as Karius shocker costs Liverpool|
|Cristiano is happy and will continue to be happy – Perez cools Ronaldo future talk|
|Win as a team, lose as a team - Liverpool captain Henderson not blaming Karius|
|Modric: Madrid have built dynasty like Bulls, Celtics and Lakers|
|Where would Cristiano go? - Benzema predicts Ronaldo stays at Madrid|
|We do not think about that - Zidane shrugs off Ronaldo exit talk|
|The divine right of kings: Zidane´s Real Madrid ride luck all the way to greatness|
|Klopp fears Salah will miss World Cup|
|Du Plessis returns, 17 uncapped players selected by South Africa|
|Bale demands playing time after Champions League heroics|
|Ramos: Ronaldo is indispensable to Real Madrid|
|It´s been beautiful to play for Real Madrid - Ronaldo hints at shock exit|
|Salah injury marked beginning of the end for Liverpool|
|Bale double makes Champions League history|
|Bale, Mandzukic & the best Champions League final goals|
|Real Madrid 3 Liverpool 1: Brilliant Bale undoes Klopp and calamity Karius|
|Jokanovic proud Fulham stuck to style in Wembley win|
|Real Madrid´s Carvajal limps out of final to prompt Spain fears|
|Broughton and Catalans continue fine form|
|Tearful Salah off injured in Champions League final|