Taking a stand against racial injustice has boosted Naomi Osaka's motivation and energy going into this year's U.S. Open, her coach Wim Fissette said on Monday.

Taking a stand against racial injustice has boosted Naomi Osaka's motivation and energy going into this year's U.S. Open, her coach Wim Fissette said on Monday.

Novak Djokovic was disqualified in the U.S. Open fourth round on Sunday for striking a line judge with a ball after going 5-6 down in the first set against Spain's Pablo Carreno Busta.

Former champion Naomi Osaka was at her free-swinging best as she stormed into the U.S. Open quarter-finals with a 6-3 6-4 win over Anett Kontaveit on Sunday.

Former champion Naomi Osaka was at her free-swinging best as she stormed into the U.S. Open quarter-finals with a 6-3 6-4 win over Anett Kontaveit on Sunday.

American Shelby Rogers ousted sixth seed Petra Kvitova in the fourth round of the U.S. Open on Sunday, winning 7-6(5) 3-6 7-6(6) in one of the most tightly-contested matches of the tournament so far.

American Shelby Rogers ousted sixth seed Petra Kvitova in the fourth round of the U.S. Open on Sunday, winning 7-6(5) 3-6 7-6(6) in one of the most tightly-contested matches of the tournament so far.

American Shelby Rogers ousted sixth seed Petra Kvitova in the fourth round of the U.S. Open on Sunday, winning 7-6(5) 3-6 7-6(6) in one of the most tightly-contested matches of the tournament so far.

Highlights of the seventh day at the U.S. Open in New York on Sunday. The Grand Slam is being played without spectators due to the COVID-19 pandemic. (Times ET; GMT-4):

Denis Shapovalov will be eyeing a berth in his maiden Grand Slam quarter-final when he faces seventh seed David Goffin in the fourth round of the U.S. Open on Sunday.

Denis Shapovalov will be eyeing a berth in his maiden Grand Slam quarter-final when he faces seventh seed David Goffin in the fourth round of the U.S. Open on Sunday.

Denis Shapovalov will be eyeing a berth in his maiden Grand Slam quarter-final when he faces seventh seed David Goffin in the fourth round of the U.S. Open on Sunday.

Order of play on the main show courts on the seventh day of the U.S. Open on Sunday (play starts at 1500 GMT/11 AM ET unless stated, prefix number denotes seeding):

Former champion Naomi Osaka survived a third-round scare before grinding out a 6-3 6-7(4) 6-2 victory over fearless Ukrainian teenager Marta Kostyuk to reach the last 16 of the U.S. Open on Friday.

Former champion Naomi Osaka survived a third-round scare before grinding out a 6-3 6-7(4) 6-2 victory over Ukrainian teenager Marta Kostyuk to reach the last 16 of the U.S. Open on Friday.

Former champion Naomi Osaka survived a third-round scare before grinding out a 6-3 6-7(4) 6-2 victory over Ukrainian teenager Marta Kostyuk to reach the last 16 of the U.S. Open on Friday.

Croatian eighth seed Petra Martic survived another sloppy display to see off Grand Slam newcomer Varvara Gracheva 6-3 6-3 on Friday and reach the U.S. Open round of 16 for the second consecutive year.

Former champion Naomi Osaka is wearing a different facemask for each of her matches at the U.S. Open this year. They each carry the name of a Black American and aim to highlight racial injustice in the United States to a wider audience:

Former champion Naomi Osaka is wearing a different facemask for each of her matches at the U.S. Open this year. They each carry the name of a Black American and aim to highlight racial injustice in the United States to a wider audience:

Former champion Naomi Osaka is wearing a different facemask for each of her matches at the U.S. Open this year. They each carry the name of a Black American and aim to highlight racial injustice in the United States to a wider audience:

Order of play on the main show courts on the fifth day of the U.S. Open on Friday (play starts at 1500 GMT/11 AM ET unless stated, prefix number denotes seeding):

Order of play on the main show courts on the fifth day of the U.S. Open on Friday (play starts at 1500 GMT/11 AM ET unless stated, prefix number denotes seeding):

Naomi Osaka received plenty of encouragement and advice from her mother Tamaki after her second round victory at the U.S. Open on Wednesday, although it came in the form of emojis printed on a sheet of paper.

Naomi Osaka received plenty of encouragement and advice from her mother Tamaki after her second round victory at the U.S. Open on Wednesday, although it came in the form of emojis printed on a sheet of paper.

Naomi Osaka received plenty of encouragement and advice from her mother Tamaki after her second round victory at the U.S. Open on Wednesday, although it came in the form of emojis printed on a sheet of paper.

RT @TheTennisLetter: Naomi Osaka had her baby girl two days ago. Her boyfriend, rapper Cordae, announced it at his show. Congrats to bot…

Cordae and Naomi Osaka Welcome First Child https://t.co/SVs3CesK3Z https://t.co/IWgIaOmPSt

RT @TheTennisLetter: Naomi Osaka had her baby girl two days ago. Her boyfriend, rapper Cordae, announced it at his show. Congrats to bot…

RT @Phil_Lewis_: Naomi Osaka welcomes first baby, a girl, with boyfriend Cordae https://t.co/04EKu0l9aM

Tennis star Naomi Osaka has welcomed her first child, a baby girl, with her boyfriend, Cordae. https://t.co/Vd1o8TUMdi

RT @TODAYshow: A source close to Naomi Osaka confirmed to https://t.co/LaKO1WBr7r that she welcomed her first child, a baby girl, with boyf…

“Dreams don’t have to be just dreams. You can make it a reality; if you keep pushing and keep trying, you’ll eventually reach your goal. And if that takes a few years, that’s great, but if it takes 10 or 20, that’s part of the process.” Naomi Osaka #Wekeepgrinding

RT @goesonrants: Totally unexpected Naomi Osaka reference in this beautiful, BEAUTIFUL interview with Cillian Murphy https://t.co/j0QsjKng7o

RT @goesonrants: Totally unexpected Naomi Osaka reference in this beautiful, BEAUTIFUL interview with Cillian Murphy https://t.co/j0QsjKng7o

RT @goesonrants: Totally unexpected Naomi Osaka reference in this beautiful, BEAUTIFUL interview with Cillian Murphy https://t.co/j0QsjKng7o

RT @RajBhandari1001: 2024 AO: Naomi Osaka Angelique Kerber Venus Williams Caroline Wozniacki Elina Svitolina Simona Halep (hopefully) oh…

RT @Pauline98476699: Naomi Osaka welcomes baby girl, rapper boyfriend Cordae reportedly announces it during show https://t.co/4o4ByllxER

RT @goesonrants: Totally unexpected Naomi Osaka reference in this beautiful, BEAUTIFUL interview with Cillian Murphy https://t.co/j0QsjKng7o

Naomi Osaka welcomes baby girl, rapper boyfriend Cordae reportedly announces it during show https://t.co/4o4ByllxER

RT @SoMetroRadio: Naomi Osaka welcomes baby girl, rapper boyfriend Cordae reportedly announces it during show https://t.co/uaHOX9r8Q2

Naomi Osaka welcomes baby girl, rapper boyfriend Cordae reportedly announces it during show https://t.co/uaHOX9r8Q2

RT @goesonrants: Totally unexpected Naomi Osaka reference in this beautiful, BEAUTIFUL interview with Cillian Murphy https://t.co/j0QsjKng7o

RT @goesonrants: Totally unexpected Naomi Osaka reference in this beautiful, BEAUTIFUL interview with Cillian Murphy https://t.co/j0QsjKng7o

RT @goesonrants: Totally unexpected Naomi Osaka reference in this beautiful, BEAUTIFUL interview with Cillian Murphy https://t.co/j0QsjKng7o

#HomePage #Music Cordae And Naomi Osaka’s Adorable Baby Shower Photos Reveal The Pair Has ‘A Little Princess’ On The Way https://t.co/Vxss6h1r5v

RT @goesonrants: Totally unexpected Naomi Osaka reference in this beautiful, BEAUTIFUL interview with Cillian Murphy https://t.co/j0QsjKng7o

RT @goesonrants: Totally unexpected Naomi Osaka reference in this beautiful, BEAUTIFUL interview with Cillian Murphy https://t.co/j0QsjKng7o

RT @goesonrants: Totally unexpected Naomi Osaka reference in this beautiful, BEAUTIFUL interview with Cillian Murphy https://t.co/j0QsjKng7o

RT @goesonrants: Totally unexpected Naomi Osaka reference in this beautiful, BEAUTIFUL interview with Cillian Murphy https://t.co/j0QsjKng7o

RT @goesonrants: Totally unexpected Naomi Osaka reference in this beautiful, BEAUTIFUL interview with Cillian Murphy https://t.co/j0QsjKng7o

Naomi Osaka reportedly welcomes baby girl as boyfriend Cordae announces news during show #wimbledon https://t.co/3px02XdCrF

Naomi Osaka welcomes baby girl, rapper boyfriend Cordae repo https://-- Osaka is joining the other women who seem to love having bastard babies. She is joining the black single mothers in giving birth to 75% of unwed mother. These blacks are almost a line from birth to prison.

Naomi Osaka welcomes baby girl, rapper boyfriend Cordae reportedly announces it during show https://t.co/9YfRlmV6Wl

this is the SHIT about our culture bc half its not good enough but when you succeed suddenly they take credit for your work we've seen it with naomi osaka becky is literally asian half is still indicates an existence of asian blood also richie is literally a male version of her? https://t.co/i6hRa73qhJ

RT @KeneAkers: Don't forget; Naomi Osaka was called a ‘Terrorist’ for Lending Her Voice to the Black Lives Matter Movement! https://t.co/EL…

I didn’t even know Naomi Osaka was pregnant - just thought she was still on her mental health retreat

Naomi Osaka that’s it damn. I know she popular but her she my favorite womens tennis player.

RT @TrackerTennis: "Why should she have to perform?" - Oppenheimer star Cillian Murphy sympathizes with Naomi Osaka over mutual dislike of…

RT @factsand2cents: I remember Naomi. Osaka advocating to to away with these ridiculous press conferences after tennis matches. That they w…

Barbie Role Models Doll Naomi Osaka Collectible with Tennis Dress, Racket and Accessories, Posable https://t.co/CvfGj7pXnw via @amazon

I've just watched episode S01 | E03 of Naomi Osaka! https://t.co/gGM5kGI7ko #tvtime https://t.co/lvU6Uic8o3

RT @TrackerTennis: "Why should she have to perform?" - Oppenheimer star Cillian Murphy sympathizes with Naomi Osaka over mutual dislike of…

RT @TrackerTennis: "Why should she have to perform?" - Oppenheimer star Cillian Murphy sympathizes with Naomi Osaka over mutual dislike of…

RT @TrackerTennis: "Why should she have to perform?" - Oppenheimer star Cillian Murphy sympathizes with Naomi Osaka over mutual dislike of…

was wondering where naomi osaka was. shes pregnant. 25yr old one of the best tennis players in the world and gets herself pregnant. i dont know. i would of waited.