If Napoli want to replace lukaku with potential striker will not take them long time before they will get someone that will fit his wing but Napoli will not embark on such risk, because lukaku is giving the club what they want from the player. Is like you don't know that there are many players in some cluds just that they have not been allow to join club of their choice that will make them shine.
Romelu Lukaku has a serious injury and he will stay out of the fields for months. He will not have a surgery but he cannot return before at least another month if not couple of months.
His team will have to deal with his absence for quite long time so unless they do very well in the first matches, they will be in hurry to find a suitable replacement
Yes. Lukaku injury is quite serious, and he will likely be out for a long time. This situation will certainly be detrimental for Napoli, and it will also be felt by the Belgian national team which will play a qualifying match in September.
Furthermore this also forces Conte to think hard about finding a solution to keep Napoli competitive even without Lukaku their mainstay. Alternatively he could seek a new striker as a temporary replacement, as the lack of a sharp striker would certainly make it difficult for Napoli to defend their title. Losing Lukaku would undoubtedly be a significant blow for Napoli as Lukaku is a crucial player for Napoli and a key player in Napoli's success last season.