The 28-year-old Belarusian returned to action in June, after the birth of her son Leo last December, and had been hopeful that legal arrangements could be worked out to allow her to compete in the August 28-September 10 grand slam in New York.
Marin Cilic and Milos Raonic booked their spots in the Paris Masters second round on Monday, while Roger Federer pulled out of the tournament with next month's ATP Finals on the horizon.
IMAGES from Day 2 of the Wimbledon Championships, at the All England Lawn Tennis and Croquet Club, London, on Tuesday.
Images from the second day's play of the 2016 French Open at the Roland Garros
It was Kristyna's first win over a top-five ranked player and she will go on to play fellow Czech Barbora Strycova in the quarter-finals.
Serbian world number two Novak Djokovic forced the Davis Cup final against holders Czech Republic into a decisive fifth rubber on Sunday with a 6-4, 7-6(5), 6-2 win over Tomas Berdych in the opening reverse singles.
Showing great mobility, the towering Czech neutralised the potentially tricky world number 25 in a sometimes tetchy two-hour contest on Margaret Court Arena.
Psychologists have become a more established presence on the tennis tour, with top players like Andy Murray and Petra Kvitova espousing the benefits.
Raducanu falls in first match since US Open triumph.
Top seeds Sania Mirza and Martina Hingis defeated Czech pair of Andrea Hlavackova and Lucie Hradecka in straight sets to virtually seal a women's doubles semi-final spot in the WTA Tennis Finals in Singapore.
Petra Kvitova was proud of her second-set fightback against Naomi Osaka in the Australian Open final, on Saturday, but was left ruing her inability to convert her chances in her loss to the Japanese.
World No 8 Muchova withdraws from Aus Open with wrist injury
Images from the men's singles Round of 16 matches at the US Open on Monday.
His great rival Roger Federer had already maintained his regal progress earlier on the showcourt and Serena Williams then followed with another thumping win.
World number one Jannik Sinner's bid for a second Grand Slam title continued to gain momentum as he thumped Christopher O'Connell 6-1, 6-4, 6-2 on Saturday to reach the US Open fourth round.
Federer and world number one Nadal won the first three grand slam titles of the season as they came back to prominence with a bang, and nothing suggests their first-round opponents, American Frances Tiafoe and Serbian Dusan Lajovic, will bother them.
Indian tennis stars Leander Paes, Sania Mirza and Rohan Bopanna made a rampaging start to their campaign at US Open as they advanced to the second round of the US Open along with their respective partners after notching up contrasting wins at Flushing Meadows, in New York.
Runner-up Pliskova will move into the top-10 of the world rankings for the first time in her career
A disbelieving Magda Linette continued her dream run at the Australian Open on Wednesday with a stunning victory over former world number one Karolina Pliskova to move into the semi-finals.
A round-up of Friday's action in the Davis Cup.
Indian Davis Cup team sweats it out at 'mini cauldron', match timings revised due to tough conditions
With the unique format at the WTA Finals, it is all about how you finish rather than how you start as new champion Agnieszka Radwanska proved perfectly in Singapore this week.
Top-seeded Elina Svitolina of Ukraine, wearing her national colors of blue and yellow, won on "a special night for me," beating Russia's Anastasia Potapova 6-2, 6-1 on Tuesday in the first round of the Abierto GNP Seguros in Monterrey, Mexico.
World No 9 Lucie Safarova will miss this month's Australian Open as she has yet to regain full fitness following a bacterial infection last year, the Czech said on Friday.
The Indian pair of Saketh Myneni and Ramkumar Ramanathan beat compatriots Yuki Bhambri and Divij Sharan in straight sets to advance to the quarter-finals of the Bengaluru Open 2 ATP Challenger, in Bengaluru, on Wednesday.
Here are some of the best moments from the 2019 Australian Open.
A summary of Friday play at the French Open.
Muchova, who came into the match against the 12th seed with a world ranking of 202, was understandably nervous from the outset but grew into the contest and eventually prevailed 3-6, 6-4, 6-4 in two hours and 27 minutes.
The women's draw at the US Open has been in news for the upsets it created. Almost everyday one or some days even two of the top seeds feel to unknown players.
Karolina Pliskova won her first title of the year on Sunday with a 7-6(2), 6-4 victory over American CoCo Vandeweghe in the final of the Porsche Tennis Grand Prix.
Karolina Pliskova ruined any chance of another Flushing Meadows sister showdown as she claimed a dramatic 4-6, 6-4, 7-6(3) win over sixth-seeded Venus Williams on Monday to reach the US Open quarter-finals.
Aryna Sabalenka of Belarus and Paula Badosa of Spain, earned second-round wins
Images from the US Open women's semi-finals on Thursday.
Two-time champion Victoria Azarenka won a battle of former girls' champions at the Australian Open by easing past Czech Barbora Zahlavova Strycova 6-4, 6-4 on Saturday to advance to the fourth round at Melbourne Park.
The Indian qualifier, who savoured his best ever performance on the ATP World Tour, went down fighting 4-6, 6-4, 3-6 against the world number 45 from South Africa in the quarter-finals played on Friday.
Davis Cup holders Britain edged into a 2-1 lead in Serbia after Jamie Murray and Dominic Inglot won Saturday's doubles.
India's tennis ace Sania Mirza and Cara Black showed nerves of steel as they saved three match points in the Super Tie Break against Kveta Peschke and Katarina Srebotnik to cruise into the summit clash of the WTA year-end finals, in Singapore on Saturday.
Briton Andy Murray and Germany's Angelique Kerber were named ITF World Champions on Tuesday, capping stellar years for the men's and women's world number ones. Murray, whose brother Jamie was named doubles World Champion along with Brazil's Bruno Soares, won Wimbledon in July before becoming the first player to win two Olympic singles gold medals when he retained his crown in Rio de Janeiro in August.
Indian tennis ace Sania Mirza stormed into the mixed doubles semifinals besides reaching the doubles quarterfinals, but compatriot Leander Paes exited the US Open with unexpected defeats in both his events.
Images from Day 1 of the French Open matches played at Roland Garros on Sunday.
