Kayla Day
A left-handed American tennis fighter who climbed from junior US Open champion to the gritty upper tiers of the pro tour.
Born 1999 (age 27)·American tennis player·Birthday: September 28·Generation Z
Biography
Kayla Day won the girls' singles title at the 2016 US Open, then cracked the WTA top 100 by 2017. The left-handed Californian plays an aggressive baseline game, using heavy topspin and a fighting spirit to unsettle opponents. She reached a career-high ranking of No. 86 in 2024, grinding through qualifying draws and lower-tier events to earn points. She has won multiple ITF titles and one WTA 125k event. Day trains at the USTA National Campus in Orlando.
Generation Z
1997–2012
Born into smartphones, social media, and school shootings. The most diverse generation in history. Pragmatic about money, fluid about identity, anxious about the climate. They do not remember a world before the internet.
Kayla was born in 1999, placing them squarely in the Generation Z. The events that shaped this generation — social media, climate anxiety, and a pandemic — shaped the world they entered and the choices available to them.
#1 When Kayla Was Born
The biggest hits of 1999
#1 Movie
Star Wars: Episode I
Best Picture
American Beauty
#1 TV Show
ER
Kayla's Life & Times
The world at every milestone
1999Born
Columbine shooting; Y2K panic builds
Gas: $1.17/galHome: $113,900Min wage: $5.15/hrPresident: Bill Clinton"Believe" — CherBest Picture: American Beauty
2004Started school
Indian Ocean tsunami kills over 230,000
Gas: $1.88/galHome: $157,300Min wage: $5.15/hrPresident: George W. Bush"Yeah!" — UsherBest Picture: Million Dollar Baby
2012Became a teenager
Curiosity rover lands on Mars; Sandy Hook shooting
Gas: $3.64/galHome: $143,200Min wage: $7.25/hrPresident: Barack Obama"Somebody That I Used to Know" — GotyeBest Picture: Argo
2015Could drive
Paris climate agreement; same-sex marriage legalized in the US
Gas: $2.43/galHome: $171,900Min wage: $7.25/hrPresident: Barack Obama"Uptown Funk" — Mark Ronson ft. Bruno MarsBest Picture: Spotlight
2017Could vote
#MeToo movement; solar eclipse crosses the US
Gas: $2.42/galHome: $195,000Min wage: $7.25/hrPresident: Donald Trump"Shape of You" — Ed SheeranBest Picture: The Shape of Water
2020Turned 21
COVID-19 pandemic shuts down the world
Gas: $2.17/galHome: $248,800Min wage: $7.25/hrPresident: Donald Trump"Blinding Lights" — The WeekndBest Picture: Nomadland
2026Age 27 today
Gas: $3.91/galPresident: Donald Trump
Key Achievements
- Won the girls' singles title at the 2016 US Open as a junior.
- Achieved a career-high WTA singles ranking of world No. 84 in April 2024.
- Reached the third round of the US Open in 2023, her best Grand Slam main draw result.
Did You Know?
She is of Filipino descent on her mother's side.
Day was also a highly ranked junior soccer player before focusing fully on tennis.
She won her first WTA 125K series title in Charleston in 2023.
“I love the feeling of hitting a clean winner down the line.”
