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Three aged care residents at a northwest Sydney facility have caught COVID-19 from an infected staff member but are asymptomatic and in good spirits, operators say.

Two of the three residents were also fully vaccinated against the virus.

SummitCare Baulkham Hills said in a statement on Sunday the residents were transferred to Westmead Hospital as a precautionary measure but are doing well.

"The fact that the affected residents are showing no symptoms at this stage shows their early vaccinations have worked," a SummitCare spokesman said.

All other tests on workers and staff at the Baulkham Hills facility have returned negative so far and the site is in full lockdown. Deep cleaning is taking place.

Almost all of SummitCare Baulkham Hills' 149 residents are fully vaccinated against COVID-19.

Premier Gladys Berejiklian, meanwhile, says it is "too soon" to tell whether the lockdown of Greater Sydney, the Central Coast, Blue Mountains and Wollongong will be extended beyond July 9.

NSW is in a critical phase of its two-week lockdown, with cases uncovered in the coming days to help determine if stay-at-home orders have to be extended.

The state recorded 35 local virus cases in the 24 hours to 8pm Friday, bringing the current outbreak to 261 cases.

While it's the highest daily case number since the state's first wave in early 2020, the majority of cases have been in isolation for their entire infectious period.

"If all of us continue to do the right thing, we're able to leave the lockdown in a timely way. The next few days will be telling," Ms Berejiklian told reporters.

She said authorities wanted to see a rise in the proportion of new cases that were already in isolation, with the next several days critical to the lockdown effort.

Authorities listed a string of new exposure sites across Sydney on Friday and Saturday.

The latest cases show the epicentre of the outbreak has shifted from the city's east, to the western and southwestern suburbs.

Anyone who has been in the centre of Auburn in Sydney's west since June 27 is being told to get tested, even if they don't have symptoms.

New close-contact exposure sites were late on Saturday announced at Hop Hung Asian Grocery in Lakemba on June 30 and Strathfield Plaza Medical Practice on July 1.

Meanwhile NSW has lifted stay-at-home orders for travellers from Western Australia, the Northern Territory and parts of Queensland as restrictions in those states and territories have eased.

NSW Labor health spokesman Ryan Park on Sunday said in a statement the government should incentivise COVID-19 vaccination by offering additional "Dine and Discover" hospitality vouchers to those who get the jab.

Mr Park said this would help boost vaccination rates while injecting money into local business.

The government has previously said supply issues, rather than a lack of demand, are to blame for low vaccination coverage.

© AAP 2021

England are going back home to a European Championship semi-final date with tournament sentimental favourites Denmark after overwhelming Ukraine 4-0 in Rome.

Captain Harry Kane scored twice as England swept past Ukraine in their quarter-final on Saturday then immediately switched his team's thoughts to the job ahead, determined to keep a lid on rapidly-rising expectation.

It was the only match that England had to play away from Wembley Stadium and it was the team's most dominant performance of the tournament.

Harry Maguire and Jordan Henderson also scored as England kept a clean sheet for the fifth straight match.

England now face Denmark at Wembley on Wednesday.

The Danes, who have won admiration and developed into a surprise contender after their tournament began with midfielder Christian Eriksen suffering cardiac arrest on the field, advanced by beating the Czech Republic 2-1 in their quarter-final in Baku.

Italy will face Spain in the other semi-final match on Tuesday, with the final next weekend also to be played at Wembley.

The last time England made it to the last four of the European Championship was in 1996. But the bigger goal at this point is to duplicate the success of the 1966 England team who won the World Cup on home soil.

"I've said it all along it's all about peaking for the right time," Kane said. "We are on the right track."

"To perform like we did was top-drawer - another clean sheet, four goals, it was the perfect night for us.

"We don't get carried away...we've got to keep working hard and recover well.

"We haven't done nothing yet. We've got a semi-final at Wembley. ... What a moment for us as a team, as a nation. It's there for us, it's an opportunity for us. We have to grab it with both hands."

Kane scored on England's first opportunity in the fourth minute, using one touch to redirect a through ball from Raheem Sterling for his second goal in as many matches. The ball went in off the shoulder of goalkeeper Georgiy Bushchan inside the near post.

England also scored early in the second half after Kane was fouled. A free kick from Luke Shaw set up a header from Maguire.

Four minutes later, Kane got his second by heading in another cross from Shaw on a play that included a backheel pass from Sterling as England dazzled.

Henderson's goal - his first for England after a decade with the national team - also came with a header as Ukraine's defenders had no answers to England's aerial prowess.

After failing to score in the group stage, Kane now has three goals in two matches after also scoring in the 2-0 win over Germany in the last 16.

Kane won the Golden Boot with six goals at the 2018 World Cup, when England also reached the semi-finals.

He exited to a standing ovation at the Stadio Olimpico when he came off midway through the second half.

© AP 2021

Ash Barty is beginning to make the Centre Court look like home sweet home, winning her third match of the week on the most famous court in tennis in a manner which stamps her as the woman to beat at this Wimbledon.

The world No.1 outplayed the potentially dangerous Czech Katerina Siniakova 6-3 7-5 on Saturday, stepping her game up a significant notch after two fairly comfortable but much more uneven performances against Carla Suarez Navarro and Anna Blinkova.

This was much more like it, with the Australian dominating a potentially tricky opponent and stuttering only briefly with the winning line in sight, when she dropped her delivery for just the second time while serving for the match at 5-4.

After then earning an immediate break back, courtesy of a delightful drop shot-lob combination, Barty made no mistake second time around.

The top seed got the job done after one hour 37 minutes to earn a last-16 place just as she had done in the previous edition in 2019.

"I've been very spoilt so far, enjoying absolutely every second I've been able to play on Centre Court," said Barty about the rare privilege of being granted three first-week outings there.

"Today's match was a little bit better again with the level. I felt like I was able to control more of the match and kind of bring it back to my patterns more often. I felt like I was able to use my serve effectively today.

"Overall happy with another solid performance, happy to be able to play some good stuff."

She was also glad her injury rehabilitation routine, following the hip problem which had ruined Roland Garros for her, had worked so well over the first week.

"It's a routine to try to manage my body as best as possible. I feel great. Physically I feel good. I trust my body. I trust my game," she said.

Barty had been put under a little pressure early on against the in-form Siniakova, who'd reached a grass-court final in Bad Homburg pre-Wimbledon and the Czech signalled the danger with an early break point.

But the Queenslander's all-court mastery quickly saw her take control, a knifing slice cut just over the net which proved impossible for world No.64 Siniakova to dig out, earning her the crucial break for 4-2.

She delivered the second of her eight aces in the match to serve out the set to love, although Siniakova battled to stay with her in the second and provided a few nervy moments when she broke for 5-5.

On Monday, Barty - who served eight aces and hammered 26 winners - will meet Siniakova's doubles partner, French Open champion Barbora Krejcikova, who had earlier on Saturday extended her win streak to 15 matches in a tough three-setter with Latvian Anastasija Sevastova

"She's had an exceptional last couple months," Barty said of Krejcikova, who she's known since they both played the 2011 Wimbledon junior event that the Australian won.

Roared on by a small but vociferous Australian contingent amid a crowd which was not as big as usual with England's football men just about to start their European Championship quarter-final tie against Ukraine.

Asked about her compatriots' chants of support at the changeovers, she smiled: "It's better than the English telling me the football's on!

"This is the wrong season of football for us. The round ball when Australia's not playing - excuse if this sounds a bit rude - but it doesn't interest me!

"I'll keep watching our Aussie Rules football - but it's certainly nice to hear some Aussie voices."

© AAP 2021