History Is Being Made at the US Open — 3 Mums Are Advancing to the Quarterfinals

Williams, ranked eighth in women's tennis going into the US Open and turning 39 this month, has already won the most US Open singles matches in history. Three-year-old Olympia is there to watch her mom go for her 24th grand slam title to tie Margaret Court's overall record.

"I just have a totally new respect for moms," Williams said, according to NBC Sports. "I would never have thought I would be playing as a mom." She continued on to say that the "plus" is that one day her daughter can look back and know she was in attendance watching.

We can't get over her cute little mask!

Pironkova, 32, is currently playing her first tournament in three years since her 2017 Wimbledon appearance, NBC Sports reports. She was a semifinalist at Wimbledon in 2010, and she gave birth in 2018 to a son named Alexander, returning to tennis eight months ago.

"Obviously, you become a different person," Pironkova said of motherhood, according to NBC Sports. "You don't focus on yourself that much anymore." She added that she's a lot more organised, has increased mental endurance, and knows her body better.

Azarenka, 31, was ranked 27th going into the US Open. She won two Australian Opens in 2012 and 2013 and, according to NBC Sports, made 16 Grand Slam quarterfinals prior to giving birth to her son Leo at the end of 2016. She won the Western & Southern Open last month after Naomi Osaka withdrew due to a hamstring injury, which became Azarenka's first tournament title since 2016.

Azarenka revealed that she doesn't know if she feels different competing as a mother. "I don't identify myself on the tennis court as a mother. I still identify myself as a tennis player," she added. "Me being in the quarterfinals, I didn't get there by being a parent. I got there by being a tennis player. But it feels amazing that I can share this moment and hopefully be a good role model to my son."

In an interview with ESPN, Azarenka said that she hopes her and the other moms' victories at the US Open are inspiring for women. She wants to show them "that they [can] continue to go for their dreams," and "continue to do what they want to do."