Having become a member of the LPGA Tour for the 2018 season, she won her opening tournament in February – the ISPS Handa Women's Australian Open – as only the second player in LPGA history to win in her first tournament as a Tour member.[1] With 13 top-10 finishes out of 25 tournaments played in 2018, she was named the LPGA Rookie of the Year,[1][2] and completed the 2018 season as the 10th-ranked female player in the world.
In 2019, she won her first two LPGA major championships at the ANA Inspiration and the Evian Championship. Ko completed the 2019 season with the official money title ($2,773,894), the Vare Trophy for the lowest scoring average (69.06), and was named LPGA Player of the Year.[3] In 2020, she won the LPGA official money title ($1,667,925) having played in only four tournaments due to the COVID-19 pandemic, and finished the season as the number one ranked player in the world. In 2021, Ko again won the official money title and the LPGA Player of the Year.[4]
Professional career
2013–2017
Having become a professional in 2013 at age 18, Ko won 10 times on the LPGA of Korea Tour over the period 2014 to 2017, winning the Nefs Masterpiece in August 2014 as her first professional victory. In 2015, she was second at the Ricoh Women's British Open.[5] Ko won the 2017 LPGA KEB Hana Bank Championship,[6] after which she announced her plans to join the LPGA Tour in 2018.[7]
On 28 July 2019, Ko clinched her second major title of the season, firing a final round 4-under 67 in the rain to win the Evian Championship by two shots with a 15-under total of 269.[12]
On 25 August 2019, Ko won the Canadian Women's Open in Aurora, Ontario. She shot a tournament record −26 (262) and won by 5 strokes. She did not make a bogey for the entire 72 hole tournament.[13] Ko went bogey-free for a tour-record 114 holes, ending her streak at the Cambia Portland Classic.[14]
Having won the season's money title and Vare Trophy for lowest scoring average, Ko was named the LPGA Rolex Player of the Year for 2019.[3]
2020
On 20 December 2020, Ko won the season-ending CME Group Tour Championship in Naples, Florida and the LPGA Tour's money title with only four starts.[15]
Later in October 2021, Ko won the BMW Ladies Championship in South Korea for her fourth win of the year, 11th overall on the LPGA Tour, and the 200th victory on the LPGA by a South Korean.[18] Ko is the fifth South Korean with at least 10 career LPGA victories.[16][17] The victory at the BMW Ladies Championship re-established Ko as the world number one in the official women's golf ranking as of October 25,[19] but the 8 November ranking dropped her to #2, a fraction of an average point per event (9.028 to 9.032) behind Nelly Korda, because the calculations are over a two-year rolling average.[20][21]
In November 2021, Ko successfully defended her title at the CME Group Tour Championship in Naples, Florida. She also won the Race to the CME Globe, Player of the Year, and topped the money list.[22]
On 31 October, without her or Atthaya Thitikul playing in a tournament the prior week (24 October), she fell to world No. 2 on her average points from 7.25 to 7.09, to make Thitikul (7.20 to 7.13) become the new world No. 1 in the women's golf rankings.[24][25]
Ko lost in a playoff to Megan Khang on 27 August at the CPKC Women's Open when she double bogeyed the first playoff hole to Khang's par.[29] But she earned $232,029 for the second place finish, pushing her total LPGA winnings to over $11.8 million and into the top 20 all-time.[30]
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