In 2018, Král reached the final of the Hellas International but lost to Toma Junior Popov of France.
[1][2] In 2021, he formed a partnership in men's doubles with Adam Mendrek and together they went on to reach the final of the Hellas International.
In 2022, Král and Mendrek won their first international title as a pair, beating Vinson Chiu and Joshua Yuan of the United States in the final.
The pair won their second title at the Azerbaijan International in 2024, beating P. S. Ravikrishna and Sankar Prasad Udayakumar in the final.
[3] In May 2024, Král and Mendrek officially qualified for the 2024 Summer Olympics men's doubles event.