The Nigeria international scored two goals to help the Italian champions secure a comeback win after the Serie A newcomers stormed to an early lead.
Garcia, while pleased with Osimhen’s stellar attacking display, expressed dissatisfaction with the striker’s defensive contributions.
“Offensively, he was excellent, he scored two goals and there is nothing I can tell him,” Garcia told DAZN.
According to reports in Italy, Osimhen is expected to remain in Napoli and pen a new deal in the coming weeks.
The Nigeria international has been linked with a number of top European clubs, including Bayern Munich, PSG and Manchester United throughout the summer transfer window.