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
|Madrid squad great and humble - Solari responds to Ronaldo|
|Langer unsure what to expect from Perth wicket|
|Fournette subjected to alleged racial abuse in Titans loss - Marrone|
|Better and better - Mbappe hails Neymar link|
|It´s the end of one of the best movies you could ever see - James pays tribute to retiring Wade|
|NASA invites Curry to see moon rocks|
|No plan B for LaLiga Miami game after Barcelona withdrawal|
|Messi´s English haul, Neymar eyes hat-trick record - Champions League in Opta numbers|
|LeBron trumps Wade in last dance, Curry scores 38 points|
|Seahawks secure dominant win over Vikings|
|Iniesta visits Messi and former club Barcelona|
|Drake makes plea for ball thrown into stands after Miami miracle|
|´Toughest pretty boy I´ve ever met´ - Langer dismisses Paine concerns|
|Van Dijk says Liverpool can challenge for double ahead of Napoli decider|
|Hazard: I´ve always loved Real Madrid|
|Yankees interested in Machado, not Harper - Cashman|
|Warriors´ Curry believes moon landing was faked|
|76ers star Butler suffers strained groin|
|Brady: Patriots still have a lot of football to play|
|´No one died´ - Belichick´s message to Patriots after stunning loss|
|Silva lauds Digne after stunning free-kick|
|Aduriz joins Messi, Ramos in LaLiga history books|
|We have a plan - Ravens coach Harbaugh prepared for Flacco return|
|´It´s difficult to accept´ - Gracia calls for introduction of VAR|
|LaLiga press on with overseas match plan despite Barcelona withdrawal|
|PSG open Coupe de France defence at fifth-tier Pontivy|
|Hazard backs Sterling as Neville reveals England star´s Euro 2016 concerns|
|Everton 2 Watford 2: Digne salvages draw with 96th-minute free-kick|
|Barcelona could ´steal´ Kane, says Pochettino|
|Oakland Raiders fire general manager McKenzie|
|Struggling Villarreal appoint Garcia Plaza as Calleja successor|
|Warriors assign Cousins to G League team|
|Barcelona pull out of plan to play LaLiga game in Miami|
|Pochettino to keep an eye on Inter when Spurs face Barcelona|
|Pochettino confirms Walker-Peters set to start against Barcelona|
|Denver Nuggets add free agent Young|
|Topping Group A no magic wand for an easy knockout draw, says Simeone|
|The cake has been made, now we need the cherry - Ancelotti targets repeat at Anfield|
|Lloris braced to face ´one of the best in history´ in Messi|
|Tuchel expects Neymar to face Red Star|
|Foden signs Manchester City deal to 2024|
|It happened to me! - Valverde laughs off Dembele timekeeping|
|´Projecting´ an Argentina return? Messi met with AFA president and Scaloni|
|Erasmus expects to leave head coach role after World Cup|
|Chelsea issue suspensions pending investigation into Sterling incident|
|Kane is extraordinary – Valverde hails reported Barcelona target|
|Man behind Naomi Osaka´s rise wins WTA Coach of the Year|
|England name unchanged Test squad as Willey returns for West Indies ODIs|
|Spalletti: No issue with Icardi watching Superclasico in Madrid|
|Klopp confirms 2013 talks with ´chatty´ Napoli president De Laurentiis|
|Sri Lanka spinner Dananjaya suspended due to illegal action|
|His reaction was just brilliant – Klopp praises Sterling for response to abuse|
|Gomez renewal a ´smart decision´ for both parties – Klopp|
|Magnificent Molinari named European Golfer of the Year|
|Barcelona best option for Frenkie de Jong, insists midfielder´s father|
|Gronkowski on Miami Miracle: ´Got to make that tackle´|
|Tottenham youngster Walker-Peters signs on until 2023|
|Juventus ´more of a family´ than Real Madrid - Ronaldo|
|Kingsley Coman contemplates retirement if injury nightmare continues|
|McVay ´sick´ over offensive failings as Rams coach takes blame for loss|
|Calleja axed as Villarreal coach|
|Kenyan Drake on Miami Miracle: I couldn´t let Gronk tackle me!|
|Ronaldo: I deserved Ballon d´Or, the numbers don´t lie|
|Rugby Australia to make Cheika decision this month|
|England defender Gomez signs new Liverpool deal|
|Ronaldo wants to see Messi follow him to Italy|
|Neymar happy to play in any position for PSG - Draxler|
|Paine insists he is ´fine´ after taking blow to finger|
|Ponzio: River players will be ´idolised´ for Libertadores success|
|Champions League permutations: How Inter, PSG and Liverpool can progress|