Kalulu faced the Galatasaray loaner in the Serie A when Osimhen led the line for Napoli.
Asked on Juve's first official podcast, Kalulu was asked for the most difficult striker he was confronted with: “I think it was Osimhen.”
Kalulu, now in his seventh year in the Serie A, was also asked about playing for AC Milan. He left Lyon as a young person for the Rossoneri.
He said: 'I thought of the club where I could develop the most and I chose Milan.
“It was not an easy choice. I couldn't return home and couldn't make mistakes. I left my comfort zone and it was good for me.”