where he defeated South African Kevin Anderson and Andreas Seppi before losing to another Italian ninth seed and eventual quarterfinalist Matteo Berrettini. Despite losing in qualifying at the Eastbourne International, Kwon entered with a second-round bye as a lucky loser after Reilly Opelka withdrew. He made the semifinals before falling to Alex de Minaur. Kwon was competing in his maiden ATP Tour semifinal after winning his first quarterfinal in his eighth attempt against Ilya Ivashka. In Astana, Kwon won his first ATP Tour-level title. There, he defeated qualifier Evgeny Donskoy, third seed Dušan Lajović, and seventh seed Laslo Đere to reach his second ATP semifinal. In the semifinal, he defeated home favourite and second seed Alexander Bublik to advance to his first ATP Tour-level final. He defeated James Duckworth in straight sets to win his first ATP title and became the first South Korean to win on the ATP Tour and only the second Korean to win a tour-level title in the Open era since 2003 Sydney champion Hyung-Taik Lee. As a result, he reached a new career-high of No. 57 on 27 September 2021. 2022: Maiden ATP 500 singles semifinal, Australian Open doubles third round At the Australian Open, he won his first match defeating Holger Rune in five sets. He lost in the second round to Denis Shapovalov in a tight five-set match with three tiebreaks. At Wimbledon, he lost in the first round to the top seed and eventual champion, Novak Djokovic, in four sets. Ranked No. 120 at the Japan Open, he reached the quarterfinals for a second time at the ATP 500-level defeating sixth seed Alex de Minaur and Mackenzie McDonald. He defeated Pedro Martinez to reach his first ATP 500-level semifinal. As a result, he moved more than 30 positions up in the rankings, back into the top 100. 2023: Second title won as lucky loser He won his second career ATP title in Adelaide, defeating Roberto Bautista Agut in three sets. In doing so, he became the first Korean to win multiple ATP titles. He became the first lucky loser to reach the final in Adelaide's tournament history and the first to win an ATP Tour title since Marco Cecchinato in Budapest in 2018. National representation Kwon has represented South Korea in the Davis Cup. He was first nominated to the team for the 2017 Davis Cup, making his debut against Uzbek tennis