Brazilian centre-back Marcao confronted winger Akturkoglu during the second half of the game when his side was leading 2-0.
An enraged Marcao headbutted Akturkoglu before swinging for the 22-year-old Turkey international twice.
Marcao was given his marching orders following a VAR )video assistant referee) review and could face a 10-match ban.
Galatasaray manager Fatih Terim said after his side saw out a 2-0 win: "The club will do what is necessary in its own way.
"Marcao will apologise to Kerem and the rest of the team for his behaviour."