Article snapshot taken from Wikipedia with creative commons attribution-sharealike license.
Give it a read and then ask your questions in the chat.
We can research this topic together.
Kayla Day (born September 28, 1999) is an American professional tennis player. She is the reigning US Open junior champion and the reigning USTA Girls' 18s national champion.
Personal life
Day started playing tennis when she was 7 years old.
Junior career
Day has been No. 1 in the Girls' 12s, 14s, 16s, and 18s US national rankings. In 2016, she climbed to No. 1 in the ITF junior rankings by winning the Junior US Open, reaching the semifinals at Wimbledon, and reaching the final at the Orange Bowl the previous year. She also won the 2016 USTA Girls 18s national championship to earn a wild card into the main draw of the US Open.
Shortly after turning 17, Day won her first career title at a $50,000 tournament in Macon. The following week, she reached the semifinal at Scottsdale to enter the Top 200 for the first time. With her combined performance at these two events, Day won the Australian Open Wild Card Challenge to earn a spot in the main draw at the first grand slam of 2017.
(W) winner; (F) finalist; (SF) semifinalist; (QF) quarterfinalist; (#R) rounds 4, 3, 2, 1; (RR) round-robin stage; (Q#) qualification round; (DNQ) did not qualify; (A) absent; (NH) not held; (SR) strike rate (events won / competed); (W–L) win–loss record.
To avoid confusion and double counting, these charts are updated at the conclusion of a tournament or when the player's participation has ended.