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
21 de mayo 2018
|Salah is ´definitely´ world´s best - Lovren|
|Rhinos captain Watkins ruled out for eight months|
|No clue - Klopp defiant over Can to Juventus claims|
|Younis tips Babar for Pakistan greatness|
|Germany squad numbers hint at World Cup good news for Neuer|
|WATCH: Moto3 rider makes spectacular jump over crashed rival|
|Leaving out Morata ´painful´ for Spain boss Lopetegui|
|Gustard to leave England role for Harlequins|
|Nainggolan retires from Belgium duty after World Cup snub|
|Spain striker Morata misses out on World Cup selection|
|LeBron or Kawhi could lead Lakers to the Finals - World Peace|
|Serena steps up Roland Garros training ahead of French Open|
|Nainggolan left out of Belgium´s World Cup squad|
|The long goodbye: Iniesta sits alone in Camp Nou after final Barcelona match|
|Wane to leave Warriors at end of season|
|Dr Fury will see you now - Tyson plans future career in medicine|
|Harden, D´Antoni rue ´soft´ Rockets performance in Warriors drubbing|
|Liverpool players can change their lives in Kiev, says Gerrard|
|Real Madrid v Liverpool: Can great deeds of the past fuel the bid for Champions League glory?|
|Wash your mouth out! - Curry´s expletive outburst earns scolding from mother|
|Rakitic lost for words as Iniesta heads for Barcelona exit|
|Conte: Chelsea must overhaul squad to change style|
|Johnston: Liverpool can´t lose Suarez, Coutinho and Salah!|
|Messi: I like Griezmann, he´s one of the best|
|Ohtani says he´s not good enough for Home Run Derby yet|
|Mendy: France are eyeing World Cup glory|
|Scott accepts two-week ban for Walker punch|
|Braves rally for six runs in the ninth to defeat Marlins|
|MLS Review: Red Bulls upstage Atlanta thanks to Wright-Phillips brace|
|Warriors breeze past Rockets in game three|
|We have a quality squad – Man City chairman hints at caution in transfer market|
|Wise cruises to maiden PGA Tour victory at Byron Nelson|
|Matic: United can fight for Premier League and Champions League with experience|
|Golden Knights GM on Stanley Cup Finals berth: I don´t know how we did it|
|I did a ´s*** job´ defending LeBron James – Morris|
|Dembele suffers sprained right ankle|
|We know Fellaini´s not going to renew with United – Mirabelli suggests Milan move|
|Cavs´ Lue not satisfied with just one win|
|They even whistled at Torres – Simeone backs Griezmann|
|I arrived as a boy, I leave as a man – Iniesta in emotional Barcelona farewell|
|Lingard: Wembley loss my worst feeling in football|
|Cahill: Conte uncertainty affecting Chelsea|
|Sarri has run out of time – Napoli chief De Laurentiis|
|Barca boss Valverde salutes departing Iniesta|
|I feel like I´ve been run over by a truck or had 15 pints - Crutchlow|
|Four sent off as Ajaccio win chaotic Le Havre play-off on penalties|
20 de mayo 2018
|Sweden win shoot-out to retain world title|
|De Vrij penalty was destiny for Inter - Icardi|
|PSG? Maybe one day - Pogba coy over long-term future at Manchester United|
|Messi wins fifth European Golden Shoe|
|Gattuso calls for more malice at Milan|
|Barcelona 1 Real Sociedad 0: Coutinho stunner lights up Iniesta´s farewell|
|Lazio 2 Inter 3: Spalletti´s men seal Champions League qualification with stunning comeback|
|Royals reach play-offs as Kings XI come up short|
|Nadal sees clearly after Rome rain is gone|
|Double whammy for Zverevs as Mischa bows out in Geneva|
|Atletico Madrid pay fitting tribute to tearful Torres|
|Hull FC claim derby spoils, Dragons off the bottom|
|Buzarnescu battles through as McHale impresses in Nuremberg|
|Neymar an artist who will not need special treatment - new PSG coach Tuchel|
|Atletico Madrid 2 Eibar 2: Torres bows out with a double|
|Napoli 2 Crotone 1: Milik and Callejon condemn visitors to the drop|
|Iniesta starts on Barcelona goodbye but Messi rested|
|Nadal rallies after rain break to dethrone Zverev in Rome|
|AC Milan 5 Fiorentina 1: Cutrone brace secures Europa League group stage spot|
|I think I made a fantastic decision - Garoppolo key to Sherman joining 49ers|
|FIFPro appeals to FIFA over Guerrero World Cup ban|
|Neymar made mistake joining PSG - Rivaldo|
|Simple for Simon as outstanding Yates extends Giro advantage|
|Ulster qualify for Champions Cup as Biggar makes history|