Serena Williams is the focus of attention on a busy opening day at the U.S. Open.

 Onut on hold as Williams gets ready for what might be her final singles encounter.

Iga Swiatek is attempting the first day, there are 63 other matches, but they have been p to win her maiden Grand Slam championship away from Roland Garros' red clay by receiving the No. 1 seed this year at the U.S. Open.

However, Swiatek had another task on the eve of the U.S. Open: getting the nerve to finally meet Serena Williams, a fearsome champion who made Swiatek feel like "a kid from kindergarten simply gazing at her."

Swiatek shared a snapshot of herself and Williams on social media on Sunday: Swiatek tweeted, "This is the highlight of my day." "Congratulations @serenawilliams on your incredible journey and illustrious career. I have the utmost appreciation for all you have done for our sport.

The buildup to this year's final Grand Slam tournament has been of that nature. At the U.S.T.A. Billie Jean King National Tennis Center, there are several well-known and up-and-coming players and plot lines. But for the time being, they are all put on hold as Williams, one of the greatest athletes of all time, gets ready to play what may be her last singles match on Monday night when she faces Danka Kovinic, an unseeded opponent.

Zhang Zhizhen, 25, and Wu Yibing, 22, are on Monday's schedule after practising together on Court 8 on Sunday. A small crowd of primarily Mandarin-speaking fans cheered them on and surrounded them for autographs and photos after the training session ended. Until this year, no Chinese man had qualified to play in the U.S. Open.

Americans Elizabeth Mandlik and Brandon Holt, who are both the offspring of U.S. Open singles champions, will play in their first Grand Slam match on Monday. Mandlik, the daughter of Hana Mandlikova, will compete against Slovenian Tamara Zidansek. Holt, the son of Tracy Austin, will compete against Taylor Fritz, the top-seeded American and son of Kathy May, a former player who reached the top 10 in the women's game.

The winner of the men's division of the 2020 U.S. Open, Dominic Thiem, will make his tournament debut on Monday after missing the Open in 2017 due to a major wrist injury. Pablo Carreo Busta, a deft player from Spain who recently won the Masters 1000 competition in Canada and has previously advanced to the semifinals of the U.S. Open, will present him with a challenging challenge.

Williams vs. Kovinic will, however, take centre stage despite the fact that other tennis players have been waiting for opportunities to meet and catch up with Williams.

The Polish sensation Swiatek, age 21, said of the 40-year-old Williams, "I watch her my whole life." Because she consistently won and reached the semifinals or finals, she was essentially everywhere. She always appeared to be physically stronger than any of her opponents, so I didn't always feel like I was this kind of player who could play similar tennis. But she's going to teach you how to exploit your position and how to kind of scare with being No. 1 mentally, for sure. In an effort to do that. I have no idea how it's progressing.

Williams' ability to balance her tennis profession with her extracurricular activities and motherhood has been a "wonderful example," according to Swiatek.

I believe it's fantastic that our sport has someone like that who paved the way and proved to us that everything is possible, she remarked. "There are no boundaries,"

After a string of disappointing matches, former No. 1 and two-time U.S. Open winner Naomi Osaka spent the most of her news conference on Friday fielding questions about Williams.

Osaka stated that her legacy was so extensive that it was difficult to put it into words. She significantly altered the sport. She has introduced tennis to individuals who had never heard of it. I believe I am a result of what she did. Without Serena, Venus, and her entire family, I wouldn't be here. I'm grateful to her a lot.
According to Osaka's father Leonard Francois, the Osakas did use the Williamses' amazing success as a "blueprint."