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.

Serena Williams is moving better than she has in years, according to her coach Patrick Mouratoglou.

Williams, 39, has looked in good form at the Australian Open as she eyes a record-equalling 24th grand slam singles title.

The American has dropped just one set on her way to the quarter-finals, in which she faces Simona Halep on Tuesday.

Mouratoglou said Williams' movement was the best it has been in several years.

"First of all, it's something that we have put the emphasis on because in tennis that's probably one of the most important things. If you are late on the ball, you can't do what you want to do. Sometimes you don't even touch the ball," he told a news conference on Monday.

"It's a sport where you have to be able to move fast from side to side and long enough. It's something that probably in the last two, three years, this had consequences for Serena.

"Even more, when you're not in a good day, you need a plan B. To be able to have a plan B, you have to be able to move well. If you can't move well, there is no plan B. The only plan is attack.

"I think it cost her a few important matches. So we have decided to find a way to bring back the footwork that she used to have in the past. I feel like she's done a great job. She's moving much better."

Williams last won a major title in Melbourne in 2017, losing four grand slam finals since then.

With all eyes on her as she aims to equal Margaret Court's record of 24 grand slam singles titles, Mouratoglou insisted that mark was not an obsession for Williams.

"Does she need that validation? I don't think she needs that validation.  But, I mean, clearly she came back to tennis to win some other grand slams, so that's for sure the goal," he said.

"Now, she's not as obsessed with the 24 than most of the people in the tennis world, but definitely she wants to win grand slams. That's the only reason why she came back to tennis."

Kemba Walker is confident the Boston Celtics will overcome their form slump after falling to another loss on Sunday.

The Celtics suffered their 10th loss in their past 15 games with a 104-91 defeat to the Washington Wizards.

Walker, who posted 25 points in the loss, was upbeat about the Celtics' chances of turning their season around.

"We've got to change some things, and we will. We will," Walker said.

"I'm very confident that we will change things and we will continue to get better. It'll change because it's not a great feeling the way we're playing. It can't get no worse than this. We're going to fix it."

Jaylen Brown also posted 25 points, but Jayson Tatum struggled, going three-of-14 from the field for just six points in 23 minutes.

Walker said the Celtics, who are now 13-13, would work together, with their next outing coming against the Denver Nuggets on Tuesday.

"Teams go through adversity every single year at some point in the season," he said.

"It's all about how you overcome it. The only way you can overcome adversity is by doing it as a whole, doing it together. And that we will do."

Andy Farrell said Ireland are "hurting" physically and mentally after they suffered a 15-13 Six Nations defeat to France at the Aviva Stadium on Sunday.

Les Bleus ended a 10-year wait for a win in Dublin, digging deep to make it two wins out of two and consign the men in green to back-to-back defeats at the start of a Six Nations campaign for the first time.

France were clinical and defended brilliantly, with Charles Ollivon scoring a classy first-half try against the run of play and Damian Penaud crossing after the break.

Ronan Kelleher's first Test try after 57 minutes left a gripping battle in the balance and Ross Byrne's mammoth long-range penalty set up a tense finale, but France held on to leave Ireland's title hopes all-but over.

Ireland were already without Johnny Sexton, Conor Murray and James Ryan due to injury and their luck at the start of the tournament was summed up when Iain Henderson and Cian Healy had to go off with blood streaming from their heads after a collision.

Both players were able to return but they were unable to prevent another defeat in a game of fine margins, with James Lowe's first-half try ruled out by the TMO as his foot made contact with the touchline. 

Ireland head coach Farrell said: "I thought we managed the game really well in the first half – even though the rain stopped it was still very wet, and obviously the French like to come with a lot of line speed.

"They defended really well in those last two minutes there. I thought the plan was going according to plan and we were doing very well set-piece wise, and our game management was very good. I thought we just lost our way a little bit in the third quarter there, and that got them back into the game.

"I suppose, really, when you look at it, if you give them set-pieces in your own half, they get over the gain line first phase, come round the corner second phase and get into their offloading game, then they're free-flowing. Some of that was a little bit soft from us.

"A lot of lads that are hurting in there – physically hurting as well as mentally. Because they put their bodies on the line for their country. The effort's not the problem at all, but it still hurts to lose this game."

Huge roars echoed around the Aviva Stadium as the ball sailed into an empty stand to end France's 10-year wait for a win in Ireland.

Time and again Les Bleus have suffered the agony of defeat in Dublin, but they showed a combination of style and substance to make it two Six Nations victories out of two.

Booming bellows of celebration and relief could be heard loud and clear on a wet Sunday as France held on to win an almighty battle 15-13.

Les Bleus have not won a Six Nations title for 11 years, consistently proving to be great entertainers but falling short with defensive fragility, indiscipline and a lack of clear thinking.

This is a different France in the Fabien Galthie era, though, with defence coach Shaun Edwards having worked wonders in a relatively short space of time to make them such a tough nut to crack.

Englishman Edwards has given France a strong backbone and that was essential as they frustrated a wounded Ireland, who were missing captain Johnny Sexton, James Ryan and Conor Murray due to injury.

A try in each half from inspirational captain Charles Ollivon and Damian Penaud proved to be decisive, with France providing the cutting edge that Ireland lacked.

Ireland had 59 per cent possession but were only able to break through a brick wall of a French defensive once, when Ronan Kelleher nipped in to set up a tense finale.

France made 180 tackles to 122 from Ireland, who will head into a rest weekend with two defeats from two, while their conquerors lead the way with Wales on nine points after making a big statement.

Billy Burns made a confident start as he set about trying to make up for his costly last-gasp kick in the loss to Wales and although he was off target with a poor first penalty, the fly-half made no mistake soon after to put Ireland in front.

The men in green were dominant and had an extra man when Bernard Le Roux was sin-binned 23 minutes in for tripping Keith Earls.

France were under the pump but stood firm, the excellent Brice Dulin grabbing slippery high balls as Ireland continued to knock at the door, missing out on an opening try when the TMO spotted James Lowe's foot touched the line as he was tackled in the corner.

Les Bleus were relishing the battle and showed their class with ball in hand to hit the front in style after 28 minutes.

The mercurial Antoine Dupont and Matthieu Jalibert featuring in a showreel of offloads before Gael Fickou tossed a clever pass over Jamison Gibson-Park, setting up captain Ollivon for a brilliant score.

Jalibert booted France into a 10-3 lead at the break and Ireland's luck was out again when Cian Healy and stand-in captain Iain Henderson went off with blood pouring from their heads following an unfortunate collision.

Penaud extended France's lead with another clinical try following a strong carry from the powerful Fickou and a fine Jalibert pass, but Kelleher scooped a loose ball from a lineout to score his first Ireland try with 56 minutes on the clock.

The nerves were jangling when Jalibert hit a post from the tee and a mammoth Ross Byrne penalty reduced the deficit to two points with 16 minutes to play.

Yet France defended for their lives to get the job done, showing fight and finesse to avoid more Dublin doom and gloom.

Ireland's Six Nations hopes are in tatters after they fell to a second successive defeat, a comeback attempt falling short in a 15-13 loss to France.

Andy Farrell's side were undone by an early red card for Peter O'Mahony against Wales, but it was their failure to capitalise in the 10 minutes when France were down to 14 that proved key this time around.

Charles Ollivon scored the first of two France tries while they were undermanned, giving the visitors an advantage they never surrendered.

They led 15-3 five minutes before the hour and, although a spirited revival gave Ireland hope, the hosts could not complete a turnaround, meaning their championship prospects are effectively over. France, by contrast, go into the first rest weekend top of the table.

Matthieu Jalibert and Billy Burns each missed early penalties before Burns knocked a simple one over to give Ireland a 3-0 lead.

The hosts were then boosted further when Bernard Le Roux was shown a yellow card for tripping during a kick-chase.

James Lowe looked to have taken an immediate advantage when he went over in the left corner but the TMO ruled he had been pushed into touch by the scrambling France defence.

Ireland were punished for not taking that chance in stunning fashion as a wonderful France attack, in which the ball was intricately worked to the right and then back left, ended with Gael Fickou sending Ollivon over.

Jallibert added the extras and landed a penalty shortly before the interval.

France wasted a golden opportunity to go further ahead following a superb carry from Julien Marchand before Ireland's task was made more difficult when Cian Healy and Iain Henderson clashed heads in a tackle.

Ed Byrne and Ultan Dillane entered the fray as replacements for their bloodied team-mates but could not help Ireland wrest control of the game away from France.

The visitors' command was strengthened in the 57th minute when Jallibert looped a long pass out to Brice Dulin, who shrugged off a defender and fed Damian Penaud for France's second try.

Yet Jallibert failed with the conversion and, after Ollivon was penalised from the kick-off, Ronan Kelleher marked his introduction by strolling over following a fortunate bounce at a line-out.

A long-range penalty from Ross Byrne trimmed the gap to two points and Jallibert failed to respond in kind nine minutes from time as he struck the upright from 51 metres.

But as in Cardiff last week, Ireland failed to produce a dramatic final say and will likely be playing for little more than pride for the rest of the tournament.

Novak Djokovic fought into the quarter-finals of the Australian Open despite concerns over a muscle injury, seeing off Milos Raonic in four sets.

Djokovic's hopes of defending his title appeared to be in doubt when he said he had a "muscle tear" and was unsure whether he would play the fourth-round clash.

But his history of dominance over Raonic was perhaps a motivating factor in him taking to the court and he stretched his head to head lead to 12-0 with his 300th grand slam win, becoming only the second player in history to reach the landmark.

He did not have it all his own way, a spirited Raonic levelling matters in the second set after losing the first on a tie-break.

However, Djokovic was in control thereafter, progressing 7-6 (7-4) 4-6 6-1 6-4, though a last-eight meeting with Alexander Zverev may prove a sterner test.

Djokovic made it eight wins in nine in tie-breaks with Raonic to take the first set and things looked bleak for the Canadian when he received treatment on his foot in the second set.

But that break proved just the tonic for Raonic as he went on to win a set against Djokovic for the first time in four grand slam meetings.

Yet the tide turned emphatically back in Djokovic's favour in the third – the Serbian winning five straight games to move into a 2-1 lead.

His success came through a familiar strategy against a player of Raonic's power on serve.

Djokovic wasted few opportunities to punish the second serve and consistently took Raonic out of his comfort zone by forcing him into long rallies.

Raonic, to his credit, did save four break points in the fourth set but the dam finally burst and he could not prevent Djokovic from snatching the fifth chance that came his way, the world number one ensuring there was to be no shock as he reached another milestone in a remarkable career.

Data Slam: Djokovic's delightful dozen

Djokovic is through to a 12th quarter-final in Melbourne, the eight-time winner last failing to reach the stage in 2018, when he lost to Hyeon Chung.

WINNERS/UNFORCED ERRORS
Djokovic – 41/25
Raonic – 50/35

ACES/DOUBLE FAULTS
Djokovic – 10/3
Raonic – 26/3

BREAK POINTS WON
Djokovic – 3/11
Raonic – 1/3

Simona Halep set up a quarter-final duel with Serena Williams after showing admirable character to battle back from a set down to beat Iga Swiatek 3-6 6-1 6-4 and seal her 100th grand slam match win.

Halep and Swiatek put on a thrilling show in the night session on Sunday, as the Romanian two-time grand slam champion demonstrated her fighting spirit to come from a set down and reach the last eight.

Swiatek took charge in the first set after saving the first two break points of the contest, eventually putting herself in a commanding position as she won the 10 of the final 11 points of the set, but Halep remained focused as her 19-year-old opponent began to wobble in the second.

Halep then snuffed out any threat of a turnaround by breaking back straight after losing on her own service in the decider and she went on to set up a meeting with Williams, who had overpowered Aryna Sabalenka earlier in the day.

Naomi Osaka also advanced, though she was by no means comfortable, while Hsieh Su-wei beat Marketa Vondrousova in straight sets.

HALEP'S REVENGE

Halep's clash with Swiatek was their first since the French Open last October, when Swiatek ran out a 6-1 6-2 winner and went on to claim her maiden major title.

Revenge was on the cards at Melbourne Park and Halep got the job done impressively, showing her mettle to return from a set down.

"Well, I thought before the match that I have to be a little bit more aggressive than Paris. In Paris I have been very far back, and my ball didn't go through the court," the second seed said. "So, I thought that it's a better chance to go and hit.

"The pressure came from the way I played the last match against her. I just expected a better game from myself, which I did, and I'm really happy about that."

Halep accepts facing Williams will be an entirely different challenge, but she remains confident despite lauding the American a "legend" in her on-court interview.

"Of course it's different, she's the only one with 23 grand slams, so you cannot compare Serena with all of us, because we do not have so many grand slams," Halep added.

"But when I step on the court, it's just another opponent, and always I'm focused on myself more than I focus on who I play. We played so many times. I know what to expect. I will just try to do my game, and I will be confident."

WILLIAMS ON COURSE

All eyes are on Williams yet again, as she hopes to equal Margaret Court's record of 24 grand slam titles – and on the evidence of her latest win, she will take some stopping as she won 6-4 2-6 6-4.

Williams revealed she had to cope with a little off-court stress this week with her clothing line, and Sabalenka certainly kept the pressure up as the 22-year-old took the second set.

But Williams responded well to the seventh seed, who became the first player to take a set off the former world number one. Williams said she remained confident despite that setback.

"Like I said on the court, I just felt like even games that I lost, I was so close to winning. Not all games, but probably most of those games," she said. "I just needed to play better on the big points.  I knew that I could. I still hadn't reached my peak. I was like, 'Okay, Serena, you got this, just keep going.'"

OSAKA RELEASES HER ANGER

Osaka was in a real spot of bother against Garbine Muguruza, but saved two match points.

The 2019 champion Osaka steadied herself and felt more composed after a brief show of frustration, as she struck the ground with her racquet.

Ultimately, she emerged a 4-6 6-4 7-5 victor, and Osaka felt letting frustration get the better of her for a moment helped her cause.

"On the first match point, I was just thinking that I didn't hit a decent serve that entire game, so I should really focus on my serve," he said. "I feel like my serve stats were pretty good that set, so I was just telling myself to do better.

"Then on the second point, when the rally started, I just told myself not to push [the ball] but also don't do something crazy and make a really bad unforced error. I felt the entire match I was overthinking. There was a moment when I got angry and hit my racquet on the ground. I feel like I released a lot of the thoughts that I had. It just made me go more into instinct-based tennis."

She will face Hsieh next, the world number 71 having beaten Vondrousova – ranked 51 places higher – 6-4 6-2.

Kevin Durant was grateful for the warm reception and tribute video upon his first return to the Golden State Warriors as he led the Brooklyn Nets to a 134-117 win on Saturday.

Durant spent three seasons with the Warriors, winning two NBA Championships and was named Finals MVP twice.

He was absent last season after undergoing surgery on a torn Achilles tendon in Game 5 of the 2019 NBA Finals, and then opted to leave as a free agent in July that year.

Saturday's contest was his first return to face the Warriors after sitting out 2019-20, and he went on to play an important role with 20 points, second only to Kyrie Irving (23) on the Nets' side.

Durant was impressed with the focus the Nets displayed, but he went on to revel in the tribute and reception afforded to him by his former team.

"We came out and played a great game," Durant said afterwards. "We were focused from this morning in shootaround, and it was a good vibe all day.

"The tribute video was cool. I think about those moments daily. Every single moment that I have had in this league, I think about it and try to analyse it and get better.

"My time here in Golden State was so much fun. It was such a big learning experience, especially learning basketball in a different philosophy. I'm going take to that with me for the rest of my life."

Warriors coach Steve Kerr was in charge throughout Durant's three-year spell in the Bay Area and felt the tribute video was the least they could do, and a similar acknowledgement will take place once fans are allowed back in attendance.

"This is something that is such a no-brainer," Kerr said. "When Kevin came here and gave us three years of just incredible basketball, the least we could do is welcome him back with open arms.

"He's a guy that gave everything to us for three years then left with a devastating injury. There should be a lot of love, he did so much for us.''

Victory leaves the Nets third in the Eastern Conference.