Aston Villa's goalkeeper Emiliano Martinez, left, and Celtic's goalkeeper Kasper Schmeichel hug each other after the Champions League opening phase soccer match between Aston Villa and Celtic at Villa Park in Birmingham, England.

Aston Villa's Morgan Rogers, right, celebrates after scoring his side's fourth goal during the Champions League opening phase soccer match between Aston Villa and Celtic at Villa Park in Birmingham, England.

Aston Villa's Morgan Rogers scores his side's fourth goal during the Champions League opening phase soccer match between Aston Villa and Celtic at Villa Park in Birmingham, England.

Aston Villa's Youri Tielemans, second right, speaks with Celtic's goalkeeper Kasper Schmeichel before a penalty during the Champions League opening phase soccer match between Aston Villa and Celtic at Villa Park in Birmingham, England.

Aston Villa's Ollie Watkins misses to score a penalty during the Champions League opening phase soccer match between Aston Villa and Celtic at Villa Park in Birmingham, England.

Aston Villa's Ollie Watkins celebrates after scoring his side's third goal during the Champions League opening phase soccer match between Aston Villa and Celtic at Villa Park in Birmingham, England.

Aston Villa's head coach Unai Emery instructs his players during the Champions League opening phase soccer match between Aston Villa and Celtic at Villa Park in Birmingham, England.

Aston Villa's Leon Bailey, left, and Celtic's Greg Taylor fight for the ball during the Champions League opening phase soccer match between Aston Villa and Celtic at Villa Park in Birmingham, England.

Celtic's Adam Idah reacts after scoring his side's first goal during the Champions League opening phase soccer match between Aston Villa and Celtic at Villa Park in Birmingham, England.

Aston Villa's Boubacar Kamara, right, holds Celtic's Adam Idah during the Champions League opening phase soccer match between Aston Villa and Celtic at Villa Park in Birmingham, England.