Kunlavut Vitidsarn

Vitidsarn exhibited promising performances throughout his junior-level tournament. He won junior tournaments including the boys' singles title in the Banthongyord Junior International and Singapore Youth International, and also the Junior Grand Prix title in Jaya Raya (Indonesia) and India in 2017. In the same year, he won the bronze medal at the Asian Junior Championships. He followed up his impressive showing in the World Junior Championships with a gold medal win.

In 2018, Vitidsarn won three Junior Grand Prix title in the Netherlands, Germany, and Indonesia. He managed to defend his title in the Banthongyord Junior International and double the title by winning the mixed doubles with Phittayaporn Chaiwan. He then upgraded his medal in the Asian Junior Championships to silver, losing the finals to Lakshya Sen. However, he managed to defend his World Junior titles. He competed in the Summer Youth Olympics in Argentina, managed to bring the silver medal in the mixed team event together with Omega team. Even though he is only 17 years old, Vitidsarn has been able to compete in senior tournaments, as proven by his achievement as he finished as finalists in the India International then won the Nepal International.

In his final year in the junior circuit in 2019, Vitidsarn managed to win double title and defend his boys' singles and mixed doubles title in the Banthongyord Junior International. He finally won a gold medal at the Asian Junior Championships, becoming the first ever Thai to win the boys' singles title, and addition a gold in the team event. Vitidsarn successfully defended his World Junior Champions title for the third time, became the first men's singles player to win three World Junior Championships titles, joining Ratchanok Intanon and Chen Qingchen as a three-time winner of the World Junior title in the same discipline. He also won four International Challenge title in Iran Fajr International, Polish Open, Finnish Open, and Spanish International.

Vitidsarn began the 2020 season as semi-finalist in the Thailand Masters. He then entered the finals of the Spain Masters losing to Viktor Axelsen. In his debut at the All England Open, he was stopped in the first round to Lin Dan in rubber games. Due to the COVID-19 pandemic, numerous tournaments on the 2020 BWF World Tour were either cancelled or rescheduled for later in the year. He played at the Super 1000 Yonex and Toyota Thailand Open but was eliminated in the second round in both tournaments. His best result in 2021 was being finalists in the Swiss Open and in the Indonesia badminton festival the World Tour Finals, where he was defeated by Axelsen.

In 2022, Vitidsarn won his first title of the year in the German Open. At the 2021 SEA Games, he won two gold medals in both the singles and team events. Competed as the seed 16, Vitidsarn claimed the silver medal in the World Championships, where in the finals he lost to Axelesen in straight game.

A good start in the 2023 season was shown by Vitidsarn by becoming semi-finalists in the Malaysia Open losing the match to Kodai Naraoka in a close rubber game lasting for an hour 53-minutes. He then beat the current world number 1 Viktor Axelsen to claim his first title of the year in the India Open. He then became the fourth Thai men's singles player to win the home soil title, the Thailand Open in early June. In the following week, he suffered an injury during the semi-finals in the Singapore Open against Anthony Sinisuka Ginting. In July, he finished runner-up in the U.S. Open. Vitidsarn's finest hour in his career came at the 2023 World Championships. In the final, he prevailed as he defeated Naraoka in a rubber game to win the gold medal, and achieved his highest BWF world ranking of third in the men's singles category. His victory at the World Championships, making him Thailand's third gold medal winner during the World Championships since it was first held in 1977. Vitidsarn competed in the Hangzhou 2022 Asian Games, but failed to win medal both in the team and individual event. He qualified to compete at the World Tour Finals as the World Champions, but was eliminated in the group stage. He closed the year as world number 7.

Vitidsarn achieved a significant milestone by winning a silver medal at the Paris 2024 Olympics, after advancing to the final by defeating world number one Shi Yuqi of China. He was ultimately bested by Denmark's Viktor Axelsen in the gold medal match. His silver medal made him the first Thai athlete to earn an olympic medal in badminton. In the BWF World Tour, his best results was being finalist in the French Open.