Super Eagles striker, Victor Osimhen failed to score on his first start after injury as they lost 4-1 to Barcelona on Tuesday night.
The Turkish champions took the lead in front of their fans, thanks to a goal from Aleksey Batrakov.
Galatasaray had a goal ruled out following a VAR check, before Barca scored four times to win the match.
Joao Cancelo, Fermin Lopez, Anthony Gordon and Karim Adeyemi all got on the scoresheet, to ensure Hansi Flick’s men have won every single fixture they have played this season.
Barcelona are now top of the Champions League, while Galatasaray sit in 34th position.
Osimhen will be hoping to lead the Yellow and Red back to winning ways when they face Genclerbirligi in the league on Saturday.