[citation needed] In 2022, Kolář made his ATP main draw debut in doubles at Chile Open alongside Nikola Milojević.

[citation needed] In his fifth qualifying attempt, Kolar finally reached the main draw of the 2022 French Open with a straight sets win over Franco Agamenone for his Grand Slam tournament main draw debut.

[1] He won his first ATP and Grand Slam match defeating home favorite and wildcard Lucas Pouille.

[2] He lost in the second round to fourth seed Stefanos Tsitsipas in four sets with three tiebreaks in a match that lasted over four hours.

[citation needed] Kolář was nominated for the Czech Republic Davis Cup team in 2017 but did not play in a match.