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.
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'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.
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.
Novak Djokovic is aware of Kei Nishikori's battling qualities having lost twice to the Japanese in 17 career meetings.
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.
Japanese fifth seed Kei Nishikori pulled out of Wimbledon before his second round match on Wednesday after failing to recover from a calf strain.
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.
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.
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.
World No 5 Kei Nishikori has withdrawn from this week's Shanghai Rolex Masters due to an injury to his left gluteal muscle.
Men's champion Stan Wawrinka avenged a tough defeat to Kei Nishikori at last year's US Open at the Australian Open on Wednesday.
Roger Federer produced another masterly display to beat Japan's Kei Nishikori 6-3 6-2 and move a step closer to the semi-finals at the ATP World Tour Finals in London on Tuesday.
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.
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 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.
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.
Japan's Kei Nishikori made a stunning start to what will surely be the first of many appearances at the ATP World Tour Finals with a 6-4, 6-4 win over home favourite Andy Murray on Sunday.
'What happens if there's 100 cases in the Village? Or it can be thousands.'
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.
The fifth seed's success made it the first time a Japanese male player had reached the last eight at Roland Garros since Jiro Satoh made it to the semi-finals in 1931 and 1933.
Marathon man Kei Nishikori secured a monumental upset by sweating out a 6-4, 1-6, 7-6(4), 6-3 win over world number one Novak Djokovic at the U.S. Open on Saturday to become the first Japanese man to reach a Grand Slam final.
There comes a moment in all great sporting careers when the puzzle fits together and for Kei Nishikori it arrived on a sweltering early September afternoon in New York.
Top seed Kei Nishikori of Japan became the first player to win three consecutive Memphis Open tennis tournament titles when he prevailed in straight sets on Sunday.
A pioneering Kei Nishikori blazed a new trail for Japanese tennis with a shock win over World No 1 Novak Djokovic at the U.S. Open on Saturday, becoming the first man from Asia to book a place in a Grand Slam final.
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.
Kei Nishikori was warned by tough taskmaster coach Michael Chang not to be satisfied, after having become the first Japanese man for almost a century to reach the US Open semi-finals, and to target the title.
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.
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.
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.
Top seed Kei Nishikori is on track for a three-peat at the Memphis Open after a narrow semi-final victory on Saturday.
'Tired' Kei Nishikori takes positives out of Open despite loss.
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.
For over three-quarters of a century men's tennis in Japan has played out like a kabuki tragedy, filled with decades of barren results, embarrassments and even a suicide.
The 18-year-old became the first Japanese player to win an ATP event for nearly 16 years when he won the Delray Beach International.
Japan's number one Kei Nishikori has been warned not to let his mobile phone go off on court during next week's home Davis Cup clash with China. The 19-year-old has been told to leave his phone in the locker room after it kept bleeping during a first-round defeat to Cypriot Marcos Baghdatis in Memphis last week, Japanese media reported on Wednesday.
Already ranked ninth in Forbes' list of top tennis earners, Japan's Kei Nishikori is due for a bigger share of the off-court largesse despite losing Monday's final at the US Open, US marketing experts say.