The former Napoli man has now scored in back-to-back league games, after opening his during his side’s 4-0 win away.
Against Rizespor, Osimhen netted in the 65th minute to double his side’s advantage after former Tottenham defender Davinson Sanchez had given them the lead.
Mauro Icardi added the third goal in the 92nd minute with the Nigeria international getting replaced in the 90th minute after another strong performance.
Galatasaray have now won all four of their league games and sit top of the table. For Olawoyin and Rizespor, the defeat leaves them 16th with just one point from three matches.
