Petr Ptáček Jr. (born 16 October 2002) is a Czech racing driver who last competed for R-ace GP in the 2020 Formula Renault Eurocup.

He was a member of the Sauber Junior Team in 2020.

† As Ptáček was a guest driver, he was ineligible for points.

(key) (Races in bold indicate pole position) (Races in italics indicate fastest lap) (key) (Races in bold indicate pole position) (Races in italics indicate fastest lap) (key) (Races in bold indicate pole position) (Races in italics indicate fastest lap) (key) (Races in bold indicate pole position) (Races in italics indicate fastest lap) † As Ptáček was a guest driver, he was ineligible for points.

(key) (Races in bold indicate pole position) (Races in italics indicate fastest lap) (key) (Races in bold indicate pole position) (Races in italics indicate fastest lap) (key) (Races in bold indicate pole position) (Races in italics indicate fastest lap)