At the 2021 Summer World University Games in Chengdu, China, Šidlauskas will compete in three events: the 50 m breaststroke, 100 m breaststroke, and 200 m breaststroke.
In his first event, 100 m breaststroke, Šidlauskas achieved the bronze medal, with a time of 59.89, but narrowly missed out on the silver medal by three-hundredths of a second (0.03) behind Poland's Jan Kulakowski.[4]