Serena Williams is in the Australian Open semi-finals for the first time since she last won a grand slam title, beating Simona Halep to set up a mouthwatering clash with Naomi Osaka.
The American great gained revenge for her Wimbledon final defeat to the Romanian two seasons ago as she conjured a 6-3 6-3 win on Rod Laver Arena.
Halep dropped just four games in that stunning grass-court success in 2019, the third of four grand slam finals that Williams has lost since landing her 23rd major in Australia four years ago.
The 24th title has remained frustratingly elusive, with Williams one away from matching Margaret Court's record haul, but perhaps this is the week where that changes.
She must get past Osaka, her heir apparent as the figurehead for the women's game, but Williams showed her prowess in this match, devastatingly proving a point.
Her power won out, with 24 winners to just nine from Halep, although the 33 unforced errors from Williams showed there is room for improvement in precision.
The tone was set from the first point, Williams with a brilliant forehand service return winner on the forehand side on her way to an immediate break of serve.
Halep forced her way level but Williams raised the tempo in the sixth game and a deep forehand into the Romanian's backhand corner secured a 4-2 advantage.
Williams served out the set to love at the first opportunity but then dipped early in the second set, Halep pinching a break when the American volleyed waywardly at the net.
What proved a consistent theme was Halep's struggle to hit through her opponent, and the two-time grand slam winner could not capitalise on a 3-1 lead in that second set, dropping five successive games as the 39-year-old Williams began to turn on some vintage form.
Dismissive of the often weak Halep serve, Williams swept through to the clash with Osaka.
"I definitely think this was the best match I've played this tournament for sure," Williams said. "I had to, going up against the number two in the world. I knew I had to do better and that's what I did, so I'm excited."
Looking forward to facing Osaka, Williams said in her on-court interview: "She's such a strong player on the court and such an inspirational person off the court, which I think is really cool. I've been watching her and I'm sure she's been watching me."
Aslan Karatsev's Cinderella story and historic run continued after sensationally reaching the Australian Open semi-finals as Grigor Dimitrov struggled dramatically with injury on Tuesday.
Former world number three Dimitrov won the opening set and was on track to move through in Melbourne, but he faded alarmingly due to a lower back problem.
Karatsev capitalised to oust his much-more fancied opponent – who was barely able to walk afterwards – 2-6 6-4 6-1 6-2 on Rod Laver Arena, the Russian qualifier and world number 114 becoming the first man in the Open Era to reach the semi-finals on his grand slam debut.
The unheralded 27-year-old also became just the second qualifier to advance to the Australian Open last four after Bob Giltinan in December 1977 as defending champion Novak Djokovic or Alexander Zverev await.
Dimitrov was aiming to reach his second Australian Open semi-final and the final four of a slam for the fourth time in his career, and the Bulgarian star started well.
After being broken in the third game, 18th seed Dimitrov put the set back on serve immediately as he took control of proceedings.
Dimitrov fired down four aces, won 82 per cent of his first serves, hit six winners and made just five unforced errors, while Karatsev's unforced-error count hit 19.
But just as Dimitrov – who had not dropped a set en route to the quarters – looked like the man to beat, he wilted in remarkable scenes as Karatsev won the second set to level the match.
Dimitrov's first-serve winners dipped to 69 per cent – his second serve extremely problematic – while his unforced errors grew to 15 in the second set – and Karatsev took advantage.
The third set was a write-off for Dimitrov, who headed to the locker room for medical treatment after Karatsev cruised to a two-sets-to-love lead.
There were remarkable scenes in the third set, Dimitrov virtually conceding as he was unable to keep up with Karatsev due to the injury.
Dimitrov, who only won 12 points in the third set as he was unable to keep up with Karatsev or generate any power on his serve, emerged for the fourth set but, while he tried to will himself on, it only delayed the inevitable in sad scenes.
Data Slam: Karatsev joins Russian club
Karatsev became the fourth Russian man to reach the Australian Open semis in the Open Era, after Aleksandar Metreveli (1972), Yevgeny Kafelnikov (1999-2000) and Marat Safin (2002, 2004-05). He is also the lowest-ranked man to reach the semi-finals of a major since Goran Ivanisevic (125) at Wimbledon in 2001.
WINNERS/UNFORCED ERRORS
Dimitrov – 21/34
Karatsev – 34/44
ACES/DOUBLE FAULTS
Dimitrov – 9/7
Karatsev – 9/6
BREAK POINTS WON
Dimitrov – 4/14
Karatsev – 8/11
Former world number one Naomi Osaka is unfazed about her record at grand slams as she eyes consistency after reaching the Australian Open semi-finals.
Osaka will face either 23-time slam champion Serena Williams or Simona Halep in the semis following Tuesday's emphatic 6-2 6-2 win over Hsieh Su-wei in Melbourne.
Three-time major winner Osaka has gone on to win the title each time she has reached the quarter-finals of a slam – beating Hsieh en route to her 2019 Australian Open triumph.
Asked about the record, Osaka told reporters: "I don't really care about the stat. Just because I've only been to four quarter-finals.
"It feels something like 20. That would be cool. But four, it's not really doing too much for me.
"I would be more impressed if I didn't lose in finals. If it says 10-0 in finals. But the fact is if I don't reach the finals, I lose in the fourth round or the third round.
"For me, I'm happy to be more consistent. I think I'm being more consistent since New York, so that's the ultimate goal for me."
Osaka – in the midst of a 19-match winning streak – overpowered veteran Hsieh on Rod Laver Arena, where the Japanese star hit 24 winners and just 14 unforced errors, while she lost just two of her 25 first-service points.
It does not get any easier for Osaka, with record-chasing Williams or two-time slam champion Halep standing in the way of a trip to Saturday's decider at Melbourne Park.
"I played both of them before I think multiple times," Osaka – confident after saving two match points against Garbine Muguruza in the last 16 – said.
"Halep, I don't really like playing her. She's someone that's really tough, someone that gets the ball back every time. For me it's definitely a mental and physical battle.
"Of course, the same goes for Serena. She's Serena, someone that I feel really intimidated when I see her on the other side of the court."
Jordan Clarkson and Ben Simmons were drawn into a high-scoring shoot-out as the NBA-leading Utah Jazz powered past the Philadelphia 76ers 134-123 in a mouth-watering showdown.
In a battle pitting the Western Conference-leading Jazz against Eastern Conference pacesetters, the Jazz came out on top thanks to Clarkson's 40 points.
Utah's Clarkson nailed a stunning eight three-pointers as he became first player to come off the bench and score 40 points in less than 30 minutes since 1991.
In response, 76ers All-Star Simmons fired up for a career-high 42 points, 12 assists and nine rebounds, and Tobias Harris put up a 36-point, 10-rebound double-double, but the 76ers could not keep up with the Jazz.
Simmons opened with a career-best quarter of 19 points to give the 76ers a seven-point lead at the first buzzer before Utah took over and claimed an eighth straight win, and a 19th win in 20 games.
Missing Joel Embiid to a back injury, the 76ers' third straight loss opened the door for the Brooklyn Nets to close the gap in the east and they obliged, posting a franchise-record 25 three-pointers in a 132-121 win over the Sacramento Kings.
Kyrie Irving put up 40 points and former MVP James Harden added a triple-double (29 points, 14 assists and 13 rebounds) to lead the Nets to a third consecutive victory as the struggling Kings fell to a fourth straight defeat.
Former world number one and two-time grand slam champion Yevgeny Kafelnikov believes it is "inevitable" that a Russian player will claim major success as the country's male trio flourish at the Australian Open.
For the first time in the Open Era, three Russian men advanced to the quarter-finals of a slam thanks to star Daniil Medvedev, Andrey Rublev and qualifier Aslan Karatsev in Melbourne.
World number four Medvedev – the 2019 US Open runner-up – will face countryman Rublev in the Melbourne Park quarters as Karatsev meets Grigor Dimitrov for a spot in the semi-finals.
Not since Marat Safin at the 2005 Australian Open has a Russian male won a slam, but Kafelnikov is excited about the future.
"We all know that it's inevitable that they're going to win a slam," Kafelnikov, who was the first Russian man to earn a grand slam singles championship via the 1996 French Open before reigning supreme at Wimbledon three years later, told ATPTour.com.
"It's a question of when and where."
Kafelnikov added: "It was really expected that two of them got to where they are. The third one is a big surprise, but a very happy surprise. I'm very happy for Aslan, finally getting his breakthrough.
"He's going to play a lot of tournaments now without any pressure for the remainder of the 2021 season in terms of getting into the main draws and a big pay cheque will also be a huge boost for him. I'm really happy for him."
Kafelnikov, who won 26 singles titles, continued: "To be honest, I would be happy if one of those guys or even both of them surpass me in terms of number of titles and weeks at number one in the world.
"I'd be happy. I'm not going to be jealous about it. My career was very successful, and hopefully they will have even better [careers]."
Australian star Daniel Ricciardo vowed to "close the gap" in the race for Formula One championship glory and the new McLaren driver is refusing to make any excuses.
Ricciardo enters his 11th season in F1 having switched from Renault to McLaren, but the 31-year-old does not expect the transition to hold him back.
Since entering F1, Ricciardo has claimed seven grand prix victories and 31 podium finishes, while he earned fifth place in the drivers' championship during the coronavirus-hit 2020 season.
After moving to McLaren to replace new Ferrari driver Carlos Sainz Jr. and pair up with the returning Lando Norris, Ricciardo has an eye on climbing the ranks.
"What I expect out of myself in 2021 is to really hit the ground running," Ricciardo said.
"Naturally it does take some time to learn a new team, a new car, but I guess I'm going to be hard on myself, not to give myself too much time.
"I think with Renault I was the same. I really wanted to be there by Melbourne, that first race, but naturally it did take a bit of time.
"I don't want to be naive but I also want to make sure I'm just leaving no stone unturned and really by the end of year I've had a big contribution to the team, moving forward and closing the gap."
Former world number one Naomi Osaka was relentless as she dismantled Hsieh Su-wei to reach the Australian Open semi-finals 6-2 6-2.
Hsieh upstaged the likes of 2019 US Open champion Bianca Andreescu en route to the quarter-finals, but the veteran was overpowered by Japanese star Osaka in Melbourne on Tuesday.
Three-time grand slam champion Osaka dominated from the outset, especially on serve – losing just two points on her first serve, as the third seed awaits record-chasing Serena Williams or Simona Halep in the final four at Melbourne Park.
Osaka emerged from the jaws of defeat in the last 16, saving a pair of match points to claim an improbable victory against last year's runner-up Garbine Muguruza.
And Osaka was a woman on a mission in sunny and warm conditions on Rod Laver Arena, where the 23-year-old broke for an early 3-1 lead.
Hsieh – the oldest player in the Open Era to make her grand slam quarter-final debut, aged 35 – had the chance to break back immediately, but Osaka held firm after fending off a pair to consolidate.
Osaka, who has gone on to win the title each time she has reached the quarter-finals of a major – beating Hsieh en route to the 2019 Australian Open crown, had another two break points saved but she still cruised in the first set.
It was a powerful but disciplined performance from Osaka, particularly on serve as she won 100 per cent of her points on first serve (12 of 12) against a helpless Hsieh.
The second set followed a similar theme – Osaka maintaining her dominance as she raced out to a 3-0 lead.
Osaka never relinquished the break, closing out the match on Hsieh's serve, with the six-time WTA Tour champion improving to 4-0 in quarter-final matches at slams, and 2-0 at the Australian Open.
Data Slam: Osaka extends streak
Eyeing a second Australian Open trophy, Osaka has now won 19 consecutive matches, dating back to February last year following the Tour's resumption amid the coronavirus pandemic. She last lost while on Fed Cup duty with Japan.
WINNERS/UNFORCED ERRORS
Osaka – 24/14
Hsieh – 14/23
ACES/DOUBLE FAULTS
Osaka – 7/1
Hsieh – 0/3
BREAK POINTS WON
Osaka – 4/12
Hsieh – 0/3
Los Angeles Lakers star Anthony Davis has been cleared of a suspected rupture of his right Achilles tendon following an MRI scan.
Davis, who left Sunday's 122-105 loss to the Denver Nuggets after suffering an Achilles strain, will miss Tuesday's game against the Minnesota Timberwolves and will be further evaluated by the NBA champions upon his return to Los Angeles.
The seven-time All-Star missed two games against the Oklahoma City Thunder with tendonosis in his right heel before returning in a win over the Memphis Grizzlies on Friday.
After posting 35 points against the Grizzlies, Davis only lasted 14 minutes – finishing with 15 points – as the Lakers went down to the Nuggets.
Blake Griffin's tenure with the Detroit Pistons appears to be over.
The Pistons have agreed to hold Griffin out of the lineup while the franchise considers either trading the six-time All-Star or possibly buying out his contract, according to Adrian Wojnarowski of ESPN.
"After extensive conversation with Blake's representatives, it has been determined that we will begin working to facilitate a resolution regarding his future with the team that maximizes the interests of both parties," Pistons general manager Troy Weaver told ESPN on Monday.
"We respect all the effort Blake has put forth in Detroit and his career and will work to achieve a positive outcome for all involved."
The trade deadline is March 25 but finding a team willing to take on Griffin's hefty contract could be tricky, considering he is owed a remaining $36.6million this season, in addition to $39m in 2021-22.
"I am grateful to the Pistons for understanding what I want to accomplish in my career and for working together on the best path forward," Griffin told ESPN in a statement.
The Pistons have the NBA's fourth-youngest roster age at 24 years, 342 days. The team is looking to rebuild and give more minutes to its younger players, including 21-year-old rookie Saddiq Bey – the 19th pick of the 2020 draft.
Griffin was the first overall selection in the 2009 draft by the Los Angeles Clippers, and was named the 2010-11 NBA Rookie of the Year, while averaging 22.5 points and a career-high 12.1 rebounds. His 63 double-doubles as a rookie trail only the 68 amassed by Shaquille O'Neal for the Orlando Magic in 1992-93 for the most by a first-year player in the last 35 seasons.
Traded to Detroit during the 2017-18 season – just 33 games after signing a five-year, $171m max deal with Los Angeles – Griffin's Pistons career got off to a promising start.
He averaged a career-high 24.5 points and was named an All-Star in his first full season in Detroit in 2018-19 while helping the Pistons reach the playoffs. Injuries, however, have plagued him in the past few seasons and his production has declined dramatically.
He appeared in just 18 games in 2019-20, averaging 15.5 points and a career-low 4.7 rebounds, while averaging a personal-low 12.3 points and 5.2 boards in 20 games this season.
In his last game for the Pistons on Friday, Griffin finished with 12 points on 4-of-11 shooting with six assists and four rebounds in 35 minutes in a 108-102 win over the Boston Celtics.
A third consecutive Australian Open quarter-final beckons for Ash Barty but the world number one is far from satisfied as she eyes a drought-ending title in Melbourne.
Barty produced a masterclass to blitz American Shelby Rogers 6-3 6-4 in the fourth round on Monday.
Not since Wendy Turnbull in 1984 has an Australian woman reached three successive quarter-finals or more at Melbourne Park, where Barty will meet Karolina Muchova in the last eight.
But 2019 French Open champion Barty is dreaming big as she looks to become the first Australian woman since 1978 to take the title.
"We're not done yet," Barty,a semi-finalist last year, said. "Obviously it's exciting to be in another quarter-final of a grand slam, particularly here in Australia.
"If we had looked at the way we were preparing during our pre-season, to have the start that we have had so far is really encouraging, but certainly not satisfied with where we're at at the moment.
"We will keep chipping away and keep trying to do the right things to progress as far as we can."
Barty arrived in Melbourne at the start of the year having not played in a competitive WTA Tour event since February 2020 due to the coronavirus pandemic.
Asked about the prolonged break, Barty – who stepped away from tennis in 2014 before returning in 2016 after playing cricket – said: "I think I know that I've done the work. I know that we prepared in the right way during the pre-season.
"We've done all the work to try to give myself the opportunity to play a good level of tennis and to a level that I know I'm capable of. It's just knowing that I put the trust in the work that we've done, more than surprising myself.
"I think I've known that I've done the work. I have the ability to play at this level and then it's just about going about all of our processes, our routines the right way. All of those came back quite naturally.
"It's something that I've practiced a lot, and I gain my confidence from that practice and from those preseasons as opposed to just match results."
Jessica Pegula said she "can't be more confident" after upsetting Elina Svitolina to reach her first grand slam quarter-final and Ash Barty stayed in the hunt for Australian Open glory on Monday.
Pegula, the daughter of NFL and NHL franchise owners of the Buffalo Bills and the Sabres, beat fifth seed Svitolina 6-3 3-6 6-3 on Rod Laver Arena to set up a showdown with her fellow American and friend Jennifer Brady.
Brady made it all the way to the semi-finals of the US Open last year and has now put together her best run at Melbourne Park after seeing off Donna Vekic 6-1 7-5.
World number one Barty has not dropped a set in her home major and started the second week by dispatching Shelby Rogers 6-3 6-4.
The top seed from Queensland's next assignment will be a meeting with Karolina Muchova, who saw the back of Elise Mertens 7-6 (7-5) 7-5.
Muchova, the 25th seed from the Czech Republic, has made it through to her second grand slam quarter-final - having also reached this stage at Wimbledon in 2019 - without losing a set.
Pegula to put friendship to one side
Pegula and Brady are close friends, but they will have to put that to one side when they meet in the quarter-finals.
The world number 61 claimed her first victory over an opponent ranked in the top 10 just over a month after Svitolina beat her in straight sets in Abu Dhabi.
Pegula hit 31 winners to Svitolina's 19 and won 21 points from 29 when she made a trip to the net as she broke new ground at a major
She said: "I can't get more confident, it's my best result yet and I'm playing good tennis. Today was a hard-fought win, so, yeah, feeling pretty good."
Pegula added on the prospect of facing Brady: "We're here to have fun and compete. If I can do it against somebody that I like, that I wouldn't mind if they beat me, hopefully not, but if they did, why not?"
Brady benefited from strict lockdown
Many players understandably struggled during and after being in a strict two-week lockdown in a hotel room following their arrival in Australia.
Brady was among the players who were not allowed out of their rooms for a fortnight, but said she used the situation to recharge her batteries before the first major of the year.
The 22nd-seeded Pennsylvanian said: "I think it was a little bit of a benefit for me, just taking a break from tennis. I had been going non-stop since World Team Tennis in June. I didn't take any time off.
"I was playing from June and then played US Open, the U.S. tournaments, and then went straight to Europe, then finished there and was training in Europe, then went home for Christmas and then came and started in Abu Dhabi.
"So obviously I didn't really feel super fresh mentally coming into Abu Dhabi. And then when I was away from tennis for two weeks, I felt like I wanted to play again to compete and I think that helped me."
Much improved Czech
Muchova had not been beyond the second round of the Australian Open before last week but now has a semi-final spot in her sights.
The 24-year-old was 4-0 down in the opening set as Mertens got off to a flyer but warmed to the task with her battling spirit and positive approach.
Muchova converted five of the six break points she earned on Margaret Court Arena, also coming from a mini-break down in a first-set tie-break.
She struck 25 winners to Mertens' 15 and advanced despite making 31 unforced errors, getting her rewards for throwing caution to the wind.
World number one Ash Barty secured another quarter-final berth at the Australian Open after outclassing Shelby Rogers 6-3 6-4.
It was a Barty party on Rod Laver Arena, where the 2019 French Open champion dominated from the outset to see off unseeded American Rogers in a little over an hour on Monday.
Barty, who appeared in the semi-finals in Melbourne last year to become the first Australian woman to reach that stage since Wendy Turnbull in 1984, raced past Rogers to set up a meeting with Karolina Muchova.
Home hope Barty and Rogers renewed acquaintances behind closed doors in the last 16 after the former won a match tie-break against last year's US Open quarter-finalist en route to claiming the Yarra Valley Classic.
Barty was unstoppable from the start, striking first in the fourth game and breaking for a 3-1 lead after precision play left Rogers helplessly scrambling around the court.
There was a test for Barty after Rogers earned a pair of break points in the seventh game, but the former saved both.
It was the only real challenge in a first set controlled by Barty, who continued where she left off in the second.
While Rogers showed glimpses, Barty – moving freely with all eyes on her heavily strapped thigh – was firmly in the groove as she broke for a 2-1 lead.
Another break followed but there was a blip for Barty, who was broken for the first time when serving for the match at 5-2 in a late Rogers resistance which only delayed the inevitable.
Data Slam: Three in a row for Barty
Barty will contest her third consecutive Australian Open quarter-final. Not since Wendy Turnbull in 1984 has an Australian woman enjoyed such a run. Barty is bidding to become the first Australian woman to win the grand slam since 1978.
WINNERS/UNFORCED ERRORS
Barty – 21/16
Rogers – 14/25
ACES/DOUBLE FAULTS
Barty – 5/3
Rogers – 5/1
BREAK POINTS WON
Barty – 3/6
Rogers – 1/3
Rafael Nadal insisted he is not "obsessed" in his quest for further grand slam glory after the 20-time major champion moved through to the Australian Open quarter-finals.
Nadal advanced to the last eight of the tournament for the 13th time in his illustrious career following Monday's dominant 6-3 6-4 6-2 victory over 16th seed Fabio Fognini.
World number two Nadal is bidding to claim a record 21st slam crown, while the Spanish star is also looking to become the first man in the Open Era to win each of the four majors twice.
As Nadal looks ahead to a showdown with fifth seed Stefanos Tsitsipas, he discussed his motivations, having won everything on offer on the ATP Tour.
"I play tennis. I like tennis," the 34-year-old said. "I like what I am doing. That's the main thing.
"Of course I am very motivated to win grand slams and to play in the most important events of the year. No doubt about that.
"The only thing that I said is I have never been obsessed to try to be the best or to try to – no, I just did my way. That worked for me.
"I think the ambition is important, to have an ambition, but a healthy ambition. If you have too much ambition then you can be frustrated when you are not able to achieve all the things that you wanted.
"I never approached the sport and my career that way. That's it. I enjoy, I give my best always. I try to compete at my highest standards every day. Sometimes the highest standards are 60 per cent, sometimes they are 100 per cent. But I just try to give my best throughout my career, and that's it.
"For me the main thing is come back home with personal satisfaction that you gave it everything. That's what gives me happiness and makes me stay calm."
Nadal was under an injury cloud heading into the year's first grand slam due to a back problem which forced him to sit out Spain's ATP Cup campaign in Melbourne.
But the 2009 Australian Open champion has looked comfortable at Melbourne Park, where he is yet to drop a set.
"I played first set without a doubt [against Fognini] has been my best level in the tournament," Nadal said. "It's normal, too, because I was able to practice for two days in a row. That makes an important difference.
"But at the same time, it's important to find positive feelings now. My physical condition needs to keep improving. But I think this match helps, too.
"I was not able to practice the proper way for the last 19 days, but yesterday [Sunday] I started again to increase the amount of work on the practice, and today has been a positive victory with some long points, so that helps for the next match."
Rafael Nadal's bid to win a record 21st grand slam title remains on track, while there is a distinctly Russian flavour to the quarter-final line-up at the Australian Open.
World number two Nadal eased past Italian 16th seed Fabio Fognini behind closed doors at Melbourne Park in sunny and warm conditions on Monday.
Daniil Medvedev and Andrey Rublev ensured Russia made history en route to the quarters in Melbourne.
FAMILIAR TERRITORY FOR NADAL
Nadal reached the Australian Open quarter-finals for the 13th time in his career after outclassing Fognini 6-3 6-4 6-2 on Rod Laver Arena.
Stuck on 20 slam championships alongside Roger Federer, who is absent in Melbourne, Nadal is also looking to become the first man in the Open Era to win each of the four majors twice.
The 2009 Australian Open champion was too good for Fognini as Nadal continued his fine run of not dropping a set en route to the last eight in 2021.
Only at the French Open, where he is a 13-time champion, has Nadal reached the quarter-finals more often (14) than at the Australian Open. Federer (15) and John Newcombe (14) are the only men to have reached more Australian Open quarter-finals.
Nadal, who hit 24 winners against Fognini, will face fifth seed Stefanos Tsitsipas for a place in the semi-final after ninth seed Matteo Berrettini withdrew with an abdominal strain before Monday's showdown.
HISTORY FOR RUSSIA
For the first time in the Open Era, three Russian men have advanced to the quarter-finals of a slam.
Medvedev – the fourth seed – and Rublev joined countryman Aslan Karatsev in the last eight following their respective triumphs on Monday.
Runner-up at the 2019 US Open, Medvedev made light work of American Mackenzie McDonald 6-4 6-2 6-3, extending his winning streak to 18 matches as he reached his maiden Australian Open quarter-final.
"It's an exciting moment to be in the quarters in Australia for the first time. That's a great achievement for me," Medvedev said.
"I want more all the time, but step by step. So this is amazing … I finished at 1.30 [hours], which is important in the later stages of the grand slams, to make fast matches."
It will be an all-Russian affair in the quarters after seventh seed Rublev benefited from a walkover.
Rublev was leading 6-2 7-6 (7-3) when Norway's Casper Ruud retired on Margaret Court Arena.
"At least one of us will be in the semi-finals. So it's good news but yeah, it's going to be a tough match," said Rublev, who featured in last year's French Open quarter-finals.
"Last time he beat me in the quarters in the US Open. So now we're in the quarters in the Australian Open, so we'll see what's going to happen."
Los Angeles Lakers star Anthony Davis said he felt "completely fine" before aggravating an Achilles injury in the NBA champions' defeat to the Denver Nuggets as he awaits the results of an MRI scan.
Davis, who posted 15 points in 14 minutes, suffered an Achilles strain in the Lakers' 122-105 loss to the Nuggets on Sunday.
The seven-time All-Star was held out of the second half as the Lakers saw their seven-game winning streak snapped.
Davis, who returned from a two-game absence caused by Achilles tendonitis on Friday, will undergo a scan on Monday.
"Just driving, I think that last step kind of re-aggravated the injury I already had," he said. "Now, it feels like an Achilles sprain.
"Got an MRI tomorrow and try to figure out the next steps to get on the floor."
Davis – who insisted he and the Lakers followed all the right steps for his initial return – added: "Today was the first day that it felt completely fine. I didn't feel it at all this morning, afternoon, pre-game. I felt like I was heading in the right direction.
"The treatment and rehab side. Another setback but it's part of the game. More so frustrated that I couldn't go out there and play, but you don't want to mess around with this type of injury. Trying to figure out the best steps.
"I felt great coming back the first time against Memphis [Grizzlies]. I'll do the same thing, the same steps to get it back right. Be smarter with it, I was smart the first time, but even smarter this time. Up the treatment more to get it back where it used to be to help the team."
Superstar Lakers team-mate LeBron James, who led the Lakers with 22 points, 10 rebounds and nine assists, added: "Just want him to be healthy and get back to full strength. All I care is about his health.
"It's definitely deflating anytime you lose a big player – a big guy on your team.
"We have a lot of things that's built in around AD and a lot of other players. When he goes down, you have to switch up. That hurt us."
Rafael Nadal reached the Australian Open quarter-finals for the 13th time in his career with a straight-sets win over Fabio Fognini.
The Spanish star again looked in strong form in a 6-3 6-4 6-2 victory over Italian 16th seed Fognini behind closed doors on Rod Laver Arena on Monday.
Nadal, who is aiming to win a men's record 21st grand slam title in Melbourne, is yet to drop a set at the year's first major and beat Fognini for the 13th time in 17 meetings.
The world number two will face either Stefanos Tsitsipas or Matteo Berrettini in the last eight.
Nadal gave up an early break lead against Fognini but a powerful forehand return led to another and a 4-2 lead.
Despite serving at just 42 per cent, Nadal closed out the opening set.
Fognini was unable to consolidate a break lead in the second set, having led 4-2, before Nadal recovered from 0-40 down to hold in the eighth game.
That would prove a decisive hold, Fognini blasting a ball into the stands after netting a volley to give Nadal a break point, converted when a forehand went wide before the Spaniard secured the set.
Fognini handed Nadal his only loss from two-sets-to-love up at a grand slam at the US Open in 2015, but a break for 2-1 in the third saw the latter end any chances of a repeat on his way to a convincing win.
Data Slam: Nadal's fine Australian Open record
Only at the French Open, where he is a 13-time champion, has Nadal reached the quarter-finals more often (14) than at the Australian Open. Roger Federer (15) and John Newcombe (14) are the only men to have reached more Australian Open quarter-finals.
WINNERS/UNFORCED ERRORS
Nadal – 24/20
Fognini – 32/35
ACES/DOUBLE FAULTS
Nadal – 6/3
Fognini – 7/3
BREAK POINTS WON
Nadal – 6/19
Fognini – 2/6
Brooklyn Nets star Kevin Durant will miss at least two games due to a mild left hamstring strain.
The Nets confirmed the injury on Sunday, a day after Durant returned from the NBA's health and safety protocols amid the coronavirus pandemic to help Brooklyn past the Golden State Warriors 134-117.
Durant, who posted 20 points against former team the Warriors in his first game back in the Bay Area, will sit out Monday's clash with the Sacramento Kings and Tuesday's game against the Phoenix Suns.
Former NBA MVP and two-time champion Durant is averaging 29.0 points, 7.3 rebounds and 5.3 assists per game for the Nets this season.
Durant, who sat out his first season in Brooklyn due to an Achilles injury sustained in the 2019 NBA Finals during his time with the Warriors, has missed nine of 28 games in 2020-21.
The star-studded Nets (16-12) are third in the Eastern Conference following back-to-back wins.
The Denver Nuggets ended the Los Angeles Lakers' winning streak in the NBA, while the Milwaukee Bucks slipped to another loss.
Inspired by a Nikola Jokic triple-double of 23 points, 16 rebounds and 10 assists, the Nuggets snapped the Lakers' seven-game winning streak with a 122-105 victory on Sunday.
Jamal Murray had a game-high 25 points for the Nuggets (15-11).
LeBron James managed 22 points, 10 rebounds and nine assists for the Lakers, who saw Anthony Davis (15 points in 14 minutes) suffer an Achilles strain.
The Bucks' losing run continued with a 114-109 defeat to the Oklahoma City Thunder.
Giannis Antetokounmpo finished with a triple-double of 24 points, 17 rebounds and 10 assists, but the Bucks were beaten.
Antetokounmpo has 100 points, 43 rebounds and 21 assists over the past three games, yet Milwaukee have lost all three.
He joined Russell Westbrook (November 2016) as the only players in the past 30 years to have 100-40-20 over a three-game span but lose all three.
Lillard lifts Trail Blazers, Towns shines
Damian Lillard scored 34 points and had 11 assists to see the Portland Trail Blazers end the Dallas Mavericks' four-game winning streak with a 121-118 success.
Luka Doncic led the Mavs with 44 points and nine assists, but he missed a jump shot that would have brough Dallas level with five seconds remaining.
Karl-Anthony Towns' double-double of 20 points and 11 rebounds helped the Minnesota Timberwolves overcome the Toronto Raptors 116-112.
The Washington Wizards upset the Boston Celtics 104-91 on the back of 35 points from Bradley Beal.
Lou Williams posted 30 points and 10 assists in the Los Angeles Clippers' 128-111 win over the Cleveland Cavaliers.
Celtics' slump continues
The loss marked Boston's 10th in their past 15 games. Star Jayson Tatum in particular struggled, going three-of-14 from the field for six points in 23 minutes.
Dynamic Doncic
Doncic hit an incredible three-pointer in the Mavericks' loss. He was five-of-eight from three-point range.
Sunday's results
Washington Wizards 104-91 Boston Celtics
Detroit Pistons 123-112 New Orleans Pelicans
Minnesota Timberwolves 116-112 Toronto Raptors
San Antonio Spurs 122-110 Charlotte Hornets
Portland Trail Blazers 121-118 Dallas Mavericks
Oklahoma City Thunder 114-109 Milwaukee Bucks
Phoenix Suns 109-90 Orlando Magic
Memphis Grizzlies 124-110 Sacramento Kings
Los Angeles Clippers 128-111 Cleveland Cavaliers
Denver Nuggets 122-105 Los Angeles Lakers
76ers at Jazz
The teams leading their respective conferences meet on Monday. The Utah Jazz (22-5) are on a seven-game winning streak ahead of hosting the Philadelphia 76ers (18-9).
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