Barty is seen as Australia's best hope to end its long wait for a first home-grown women's champion.
Williams had little trouble against the 31-year-old German although the gusty breezes at Auckland Tennis Centre played havoc with her ball toss, especially when she was serving for the match at 5-3 in the second set.
Serena Williams is a year short of spending a quarter of a century as a professional player but the learning has never stopped for the 23-time Grand Slam winner.
The 27-year-old Romanian beat Sloane Stephens at Roland Garros to win her maiden Grand Slam title in June and will have spent 40 weeks at the top of the rankings by the end of the season.
'I'm very privileged to be in the second week of Wimbledon again. This is genuinely one of my favourite weeks of the year so to be prolonging my stay is a lot of fun but I'm looking forward to the challenge.'
SSerena Williams swept past Anastasija Sevastova 6-3, 6-0 on Thursday and into the final of the US Open to sit one win away from a record-equalling 24th Grand Slam title.
Images from Day 6 of the 2021 French Open at Roland Garros in Paris on Friday.
Images from the Australian Open in Melbourne on Thursday.
The lanky wild card kissed the Montreal court after completing a rousing 3-6, 6-4, 7-6(4) triumph as the 18-year-old became the youngest player to ever reach the quarter-finals of an ATP Masters 1000 event.
Dozens of Japanese towns have abandoned plans to host Olympic athletes because of concern they will overburden stretched medical resources amid a fourth wave of coronavirus infections.
Japan has extended a state of emergency in Tokyo and three other areas until the end of May and is struggling to contain a surge in COVID-19 cases
Osaka survives test to reach last 16
The absence of Japan's Kei Nishikori from this year's Australian Open has turned the spotlight on Chung Hyeon as Asia waits for its first men's Grand Slam singles champion.
Florida-born Collins battled hard in the first set on a stifling day at Rod Laver Arena but ended up steamrolled 7-6(2), 6-0 by eighth seed Kvitova.
Serena Williams crashed out of the Auckland Classic after fellow American Madison Brengle pulled off a 6-4, 6-7(3), 6-4 upset in a see-saw second round contest.
Organisers hope the anxious buildup will be forgotten when the action begins.
Her coach Patrick Mouratoglou believes she is now ready to matching Margaret Court's all-time record of 24 Grand Slams.
Images from Day 1 at the Australian Open.
Key facts and records of American Serena Williams and Canada's Bianca Andreescu
'I think when I first started, you could win a lot of easy matches, then you're in the quarter-finals, that's when it starts to get a little more tough. Now, like, there's no easy match. Everyone's playing great. Everyone's just doing a lot better'
Images from all the action on Day 4 of the Australian Open in Melbourne on Thursday
The claycourt Grand Slam at Roland Garros would now take place from Sept. 20-Oct. 4, dates that clash with several other events. With players already counting the cost of the tennis shutdown, the decision did not go down well.
Simona Halep believes this year's French Open victory has helped justify her position as the women's world number one
Coaching during matches is permitted in some women's events, but Grand Slam tournaments are among those which do not allow it.
World number one Simona Halep pulled out of next week's WTA Finals due to a lower back injury.
Rafael Nadal is in contention for the 'World Sportsman of the Year' award alongside six-time Formula 1 World champion Lewis Hamilton, six-time World MotoGP champion Marc Mrquez and six-time FIFA World Footballer of the Year Lionel Messi.
Italian Camila Giorgi has now beaten the Australian Open champion in each of their three hardcourt meetings.
Serena 'out of line' but both sides share blame says King
Venus Williams has pulled out of the upcoming Brisbane International after suffering a 'setback' in training
With no standout favourite in the women's field, it could provide an ideal stage for American Serena Williams to finally end her quest for an elusive 24th Grand Slam title.
Russia's Anastasia Pavlyuchenkova stands on the threshold of finally delivering the title long predicted
A round-up of tennis matches played on Tuesday.
Swiatek's last defeat on clay came in the WTA 1000 event in Madrid against Australian Barty, who elected not to defend her 2019 French Open title last year due to the COVID-19 pandemic.
Belarusian ninth seed Aryna Sabalenka held off a spirited challenge from American Alison Riske to win 6-3, 3-6, 6-1 and successfully defend her Wuhan Open title on Saturday.
IMAGES from the Australian Open on Tuesday.
Images from Day 7 of the 2021 US Open in New York on Sunday.
Images from the matches played on Day eight of the 2018 Australian Open at Melbourne Park on Monday
Olympic organisers say they will not reveal the final torchbearer's identity until the torch arrives in the stadium on live television, watched by billions of spectators.
Nadal set to face Kyrgios clash in second round
