Swiatek, 19, ensured her place in history as Poland's first major singles champion on Saturday, becoming the ninth woman in 14 tournaments to secure her maiden Slam title.
Former US Open champion Bianca Andreescu to miss remainder of 2020 season to focus on 'health and training'
Andreescu, who beat Serena Williams at Flushing Meadows 12 months ago to become Canada's first Grand Slam singles champion, has not played a match since hurting her knee last October at the WTA Finals in Shenzhen.
Should he continue to test positive into next week, World No 31 Nishikori would be in jeopardy of missing the start of the US Open.
US Open 2020: World No 2 Simona Halep latest in list of stars to pull out of tournament over COVID-19 fears
Halep joins a host of top players who are passing on playing at Flushing Meadows when the next Grand Slam tournament begins on 31 August.
Andreescu is the fourth woman in the top seven in the WTA rankings to pull out of the US Open, which is scheduled to start at Flushing Meadows on 31 August.
'A decision I never wanted to take': Defending champion Rafael Nadal to skip US Open due to COVID-19
Nadal's plan to skip the US Open came shortly after the Madrid Open, scheduled for September, was cancelled because of the pandemic.
Serena Williams, Rafael Nadal among big names in initial entry lists for Cincinnati; top-ranked Ashleigh Barty excluded
However, just because a player is on Wednesday’s lists does not mean she or he necessarily will compete at the New York-hosted Cincinnati event.
US Open 2020 to be held on scheduled dates without fans after New York Governor Andrew Cuomo gives go ahead
Even with the go-ahead from the state, one significant question remains for the US Open: Which players actually will participate?
Australian Open champion Sofia Kenin, US Open winner Bianca Andreescu to be part of 16-player team event in Charleston in June
American Kenin, who won this year’s Australian Open, and Canada’s Andreescu, the 2019 US Open champion, will take part in the Credit One Bank Invitational, which will be aired on the Tennis Channel and begin on 23 June.
US Open champion Bianca Andreescu remains focussed on No 1 spot despite injury setback, COVID-19 lockdown
US Open champion Bianca Andreescu has discovered a powerful tool to compensate for limited training opportunities amid the COVID-19 lockdown as the Canadian teenager remains focused on her goal to climb to the top of the women’s rankings.
Indian Wells Masters: Bianca Andreescu drops out of tournament due to knee injury, won't defend title
Reigning US Open champion Bianca Andreescu of Canada will not defend her title at the BNP Paribas Open because of a lingering left knee injury.
Mary Pierce interview: Pressures of fame difficult to handle for younger players like Naomi Osaka, says former Roland Garros champion
Former Roland Garros and Australian Open champion Mary Pierce touched base on wide range of topics such as level of women's tennis today, the unpredictability, rise of Coco Gauff and return of Kim Clijsters.
Sixteen nations will battle this week to secure the last eight spots for the revamped Fed Cup finals in April with some heavyweights desperate to avoid missing the party.
Biggest takeaway from the Australian Open: Men's and women's tennis are in very different places right now
The men have a triopoly that could quickly transform into a monopoly if Novak Djokovic stays fresh and focused. The women have something closer to mob rule with new winners emerging at a madcap clip
Australian Open 2020: Sofia Kenin turns adversity into glory as she scripts memorable final win over Garbine Muguruza
You don’t win a Grand Slam without having the ability to look danger in the eye and knock it out of the park. And as Sofia Kenin showed in that memorable 2-2 game in the deciding set, she has that ability in spades.
Apart from Gauff, current women's world No. 1 Ashleigh Barty is also in the field.
If Sharapova wants to continue playing the sport at the highest level, in an era where the likes of Bianca Andreescu and Ashleigh Barty have made variety fashionable again, that stubbornness – that made her the icon that she is today – has to give way.
Laureus Sports Awards 2020: Rafael Nadal, Lewis Hamilton and Lionel Messi among nominees for World Sportsman of the Year
Tennis stars Rafael Nadal and Naomi Osaka along with teen sensation Coco Gauf are competing for this year's Laureus Awards after being nominated in different categories.
Australian Open 2020: US Open champion Bianca Andreescu, Richard Gasquet pull out of first grand slam of the season
Bianca Andreescu announced on Twitter that she is still not fit and recovered from the knee injury she picked at Shenzhen, China, during the ATP Finals.
Auckland Open 2020: Top-seeded Serena Williams eases past Camila Giorgi in American star's first match since US Open final
Playing her first singles match since losing last year’s US Open final to Bianca Andreescu, the 38-year-old Williams fired eight aces and was hardly troubled by Giorgi