Struggling Swiatek will open her campaign against Slovakian Rebecca Sramkova.
Alexander Zverev cruised past Frenchman Lucas Pouille in straight sets in the first round of the Australian Open on Sunday.
Davis Cup heavyweights Australia and the United States eased through the first qualifying round on Saturday but Britain were knocked out as Japan hit back from 2-1 down to win 3-2, while Denmark staged a dramatic comeback to overcome Serbia.
Alex Michelsen hung on to defeat Tung-Lin Wu and help the United States take a 2-0 lead against Taiwan in the Davis Cup qualifier in Taipei City on Friday.
Former champion Naomi Osaka was sent packing from Indian Wells after losing in straight sets to Colombia's Camila Osorio.
For the fourth time in his career, the eighth-seeded Japanese has dropped one set or less en route to the quarter-finals of a major championship.
Carlos Alcaraz defeated Tallon Griekspoor of the Netherlands 6-1, 6-2 at the China Open on Sunday to capture his 200th career tour victory.
Aryna Sabalenka opened her bid for a third straight Australian Open title with an easy victory over Sloane Stephens on Sunday.
Japan's Kei Nishikori overcame Daniil Medvedev in the Brisbane International final on Sunday for his first ATP title in nearly three years and the 12th of his career.
The 32-year-old debutant at the ATP's blue riband event won the first 11 games of the round-robin clash before a relieved Nishikori finally got on the scoreboard with an angled winner.
Nishikori is the latest high-profile men's player to pull out of the season's first Grand Slam following the withdrawal of Briton Andy Murray on Saturday.
It was his first victory ever against a player ranked in the top two and it avenged the semi-final loss at the Rio Olympics where Murray went on to win gold and Nishikori settled for bronze.
'What happens if there's 100 cases in the Village? Or it can be thousands.'
Novak Djokovic is aware of Kei Nishikori's battling qualities having lost twice to the Japanese in 17 career meetings.
Thousands of athletes and staff roamed the Olympic village freely, mingling at cafes and swapping souvenir pins.
Kei Nishikori's hopes of playing at the US Open have faded further after the Japanese former world number four revealed he had tested positive for COVID-19 for a second time.
Kei Nishikori exacted a measure of revenge against Marin Cilic when the Japanese world number five overcame the Croatian in the semi-finals of the Citi Open.
Japan's Kei Nishikori dispatched error-strewn Swiss Stan Wawrinka 6-2, 6-3 in a disappointingly one-sided clash at the ATP World Tour Finals on Monday.
Novak Djokovic reached the semi-finals of the Australian Open on Wednesday after Kei Nishikori retired hurt when trailing 6-1, 4-1 in their quarter-final.
Kei Nishikori was run ragged by Novak Djokovic in their US Open semi-final on Friday and conceded he had been overwhelmed by the Serb's aggression and energy.
World No 5 Kei Nishikori has withdrawn from this week's Shanghai Rolex Masters due to an injury to his left gluteal muscle.
An All-Asian tie that catches the eye is rarer than a bottle of Australian wine at Roland Garros but Kei Nishikori's clash with Chung Hyeon in the third round of the French Open could be one to savour.
'Tired' Kei Nishikori takes positives out of Open despite loss.
Andy Murray has already scaled the tennis summit but Japan's Kei Nishikori did his best to loosen his footing before falling in a three-hour thriller at the ATP World Tour Finals on Wednesday. Home favourite Murray's insatiable will power allowed him to prevail in a brutal encounter 6-7(9) 6-4 6-4, keeping him on course for his first title at the year-ender. Should he achieve that in his eighth attempt it would guarantee the 29-year-old end the year as world number one ahead of Novak Djokovic who would steal back the crown if he manages a fifth straight title at the O2 Arena.
Japan's Kei Nishikori, who will arrive at Roland Garros without an ATP title for more than two years and desperate to prove that his career has not already peaked.
World number four Stan Wawrinka began the new season with a straight-sets victory over Viktor Troicki in his Brisbane International debut on Wednesday. Second seed Wawrinka edged out Troicki 7-6(5) 6-4 to maintain his perfect record against the Serbian whose seventh attempt at beating the Swiss failed at the Pat Rafter Arena. "I'm quite happy with my level at the start the year," Wawrinka said.
A break-out 2014 season and a career-high ranking of five has added extra weight to Kei Nishikori's shoulders, with the US Open finalist already bearing the burden of huge expectations in his home country Japan.
IMAGES from Day 10 of the US Open matches played in New York on Wednesday
Rafael Nadal struggled past Japanese teenager Kei Nishikori at the Queen's Club, winning 6-4, 3-6, 6-3 to reach the quarter-finals.
Japan's Kei Nishikori overcame second seed Andy Murray for a gruelling 1-6, 6-4, 4-6, 6-1, 7-5 see-saw victory on Wednesday to reach the US Open semi-finals.
Anyone banking on the ravages of time taking their toll on Roger Federer had better think again -- the Swiss is only getting better, according to his latest victim.
Japan's Kei Nishikori will make a third straight appearance at the ATP Tour finals next month after becoming the fifth player to qualify for the season-ending tournament, organisers said on Wednesday.
After six months out of the game, Federer's fairytale return continued under the lights of Rod Laver Arena where he emphatically quashed doubts about his fitness in three hours and 24 minutes of high-octane tennis.
Kei Nishikori was crowned Barcelona Open champion for the second consecutive year after a hard-fought 6-4, 6-4 victory over surprise Spanish finalist Pablo Andujar on Sunday.
Kei Nishikori has set his sights on making a grand slam breakthrough in 2017 after the Japanese world number five concluded a successful season in which he claimed one ATP Tour title, an Olympic medal and recorded a career-high 58 wins.
Stan Wawrinka outslugged Japanese sixth seed Kei Nishikori 4-6, 7-5, 6-4, 6-2 in energy-sapping humidity at Flushing Meadows on Friday to set up a US Open final against world number one Novak Djokovic.
Croatia's Marin Cilic swept past Japan's Kei Nishikori 6-3, 6-3, 6-3 to win the U.S. Open on Monday and reach the pinnacle of the sport one year after a doping ban kept him out of the year's final Grand Slam.
World number one Novak Djokovic continued his dominance of Kei Nishikori with a 6-3, 7-5 victory in the final of the Rogers Cup in Toronto on Sunday.
The former world number four, looking for a first Grand Slam title having been US Open runner-up in 2014, blasted Kyrgios off court as he raced through the first set in 16 minutes.
Japan's Kei Nishikori surged to a three-set victory over alternate David Ferrer at the ATP World Tour Finals on Thursday before sitting back to watch his fate unfold in the night match.