Simona Halep had a markedly easier outing than in round three to reach the Australian Open quarter-finals, while Angelique Kerber won a compelling contest with Hsieh Su-wei.
World number one Halep has endured a gruelling tournament in Melbourne as she attempts to break her grand slam duck, but the Romanian needed just under one hour and 20 minutes to put Naomi Osaka to the sword in round four.
A resurgent Kerber has played her way into contention for a second Australian Open title, but had to negotiate her way past a tricky Hsieh on Rod Laver Arena.
HALEP MARCHES ON
The fact that Halep is still in the tournament is testament to her fortitude. In round one, she overcame an ankle injury and a 5-2 first-set deficit to defeat Destanee Aiava, before in the last 32 she survived three match points to win a deciding set 15-13 against Lauren Davis.
On this occasion, it was a more straight-forward 6-3 6-2 win over Osaka that punched her ticket into the last eight for the first time since 2015.
"I didn't expect to reach the quarter-finals. I didn't expect also to stop the tournament, even if I was injured. I had nothing clear in my head. I just went on court, [and] take it match by match," Halep said of her progress.
KERBER COMEBACK ENDS HSIEH CHALLENGE
Kerber has been resurgent this season and looks close to the form that saw her win the Australian and US Open in 2016, having toiled last year to slip down the rankings.
Hsieh has earned plenty of plaudits throughout the tournament, though, and proved a tricky customer for the German before succumbing to a 4-6 7-5 6-2 defeat.
Kerber, who outclassed Maria Sharapova in the previous round, said of her win: "I was everywhere today, inside and outside of the court, she made me run everywhere. She played a lot of shots into the corners, made a lot of drop shots, so I was trying to simply bring it back."
KEYS A CONTENDER, PLISKOVA DEFEATS CZECH RIVAL
Madison Keys was not widely talked up as a possible contender for glory in Melbourne, which is perhaps unfair given her run to the US Open final last year.
The American, who missed out on the tournament 12 months ago due to wrist surgery, put on a masterclass in a 6-3 6-2 win over Caroline Garcia, hitting 32 winners – including nine aces – en route to a 68-minute victory that booked a date with Kerber.
Karolina Pliskova also progressed to the last eight by overcoming Barbora Strycova 6-7 (5-7) 6-3 6-2.
It was the first time Pliskova had faced her Czech compatriot, since Strycova criticised her FedCup team-mate for employing her former coach Tomas Krupa.
21. Februar 2018
|Horsing around: Muller takes tips from equine companion|
|Lynn set for further assessment on dislocated shoulder|
|Ronaldo jets off for a break as Madrid head to Leganes|
|Bastareaud back in one of five France changes|
|Mistake to let Kroos leave Bayern for Madrid - Sammer|
|Short´s fifty and Agar´s spin seal deserved Australian tri-series win|
|Spalletti tips Ancelotti for Italy job|
|I can´t wait for retirement - Federer|
|Mendy on course for World Cup, says Deschamps|
|Man Utd on dismal knockout run, Roma have Shakhtar curse - Champions League in Opta numbers|
|Azpilicueta hoping for greater fortune at Camp Nou|
|Out of nothing he can score goals – Heynckes hails Muller|
|CONCACAF Champions League Review: Giovinco inspires Toronto, Tigres held|
|Steelers LB Shazier says he´s ´best linebacker ever´|
|Ranieri: I´ll quit Nantes if offered Italy job|
|Thiem keeps title defence on track, Monfils saves match point in Rio|
|Barcelona are great even without Neymar – Willian|
|Del Potro, Raonic progress at Delray Beach|
|Dolphins place franchise tag on Landry|
|Colts QB Luck ´extremely optimistic´ about shoulder rehab|
|Conte wants to see out Chelsea contract but has bags packed|
|A´s respond to Gruden´s belittling of Oakland|
|Yankees acquire Drury in three-team deal with Diamondbacks, Rays|
|Messi goal will give Barcelona more space at Camp Nou – Suarez|
|Serena Williams: I almost died|
|Conte defends ´incredible´ Christensen after Barcelona error|
|Bayern taking nothing for granted after 5-0 demolition – Heynckes|
20. Februar 2018
|Valverde: Barcelona away goal not definitive for progression|
|Muller & Robben bemoan poor first half despite Bayern rout|
|Ivashka sets up Wawrinka Marseille meeting|
|Chelsea close to a perfect game against Barcelona - Conte|
|Defending for 90 minutes at Barcelona a ´suicide mission´ - Fabregas|
|Championship Review: Villa miss chance to move into promotion places|
|Messi ends his Chelsea hoodoo|
|Texans release all-time leading tackler Brian Cushing|
|Chelsea 1 Barcelona 1: Messi breaks Blues hoodoo to leave tie in the balance|
|Bayern Munich 5 Besiktas 0: Two-goal Muller inspires emphatic win after Vida red|
|Woods and Stricker appointed USA Ryder Cup vice-captains|
|Wales must attack Sexton and Murray - Gatland|
|De Vrij confirms intention to leave Lazio on free transfer|
|Sanchez move down to Champions League frustration at Arsenal - Mourinho|
|Mourinho suggests Pogba is fit to face Sevilla|
|Clinical Kerber strolls past Strycova in Dubai|
|AFC Champions League Review: Hulk & Oscar lead Shanghai, Jeonbuk Motors hit six|
|Cech expects Ospina to start for Arsenal in EFL Cup final|
|Gueye signs new Everton deal until 2022|
|FA charges Man City and Wigan for failing to control players|
|Aguero faces no action over Wigan fan incident|
|Martin released by Buccaneers|
|Las Palmas get green light to sign Viera replacement amid Nasri talk|
|De Kock, De Villiers & Du Plessis looking to Australia Tests|
|FA issues West Ham with anti-doping charge|
|Florenzi a doubt to face Shakhtar, confirms Roma´s Di Francesco|
|Maybe we ´lock him up or tie him up´ – Montella ponders how to stop Sanchez|
|French rugby crisis could last a long time - Magne|
|Pogba and Ibrahimovic train with Man Utd ahead of Sevilla tie|
|Zidane hints at resting Ronaldo for Real Madrid´s trip to Leganes|
|Biggar, Halfpenny and Williams return to Wales´ starting XV|
|Modric adds to Real Madrid injury worries|
|Braehmer pulls out of Super Series semi-final|
|Wolfsburg turn to Labbadia in fight for Bundesliga survival|
|Hales follows Rashid in signing white-ball deal|
|Wigan to investigate pitch invasion after win over Manchester City|
|Drogba ´couldn´t be more proud´ as son signs for Guingamp|
|Stones making no excuses for shock Wigan defeat|
|Bellugi scathing of Inter form and transfer policy|
|Ringrose could make Six Nations impact after comeback|
|Rakitic: I´ve not seen Messi in the gym this often|
|Winter Olympics 2018: Slovenian ice hockey star Jeglic sent home after positive doping test|
|Sevilla v Manchester United: Montella and Mourinho unified in pursuit of identity|