The league leaders have been in fine form in their previous game and were tipped to see the game out with ease.
They did a decent job against Sivasspor, defeating them 4-1, with Osimhen scoring a brace to extend his goal tally in the league.
As it happened
Victor Osimhen and Alvaro Morata led the attack for Galatasaray, with the Nigerian striker looking to increase his goal tally.
Galatasaray were quick in their approach to the game and within the first 15 minutes, Osimhen and Lucas Torreira gave the home side the lead.
The host did not look like stopping and added two goals courtesy of Baris Alper Yilmaz and Osimhen, although the visitors got a first-half consolation before the halftime break.
Galatasaray controlled most of the second half and gave the visitors no chance to get a goal, with the game ending in a 4-1 win for the host.
The win edged Galatasaray closer to the league title, with just six games left to play before the season ends.