They have to hurry up and find a good replacement, and it takes a lot to replace Lukaku, Conte bases the team's entire action on that player who takes away at least 2 men, always in the attacking phase, replacing him won't be easy, it takes physicality and a lot of mentality
Chill mate. Finding Lukaku's replacement is not easy. Especially to find someone who can fit Conte's gameplay, which is using a striker with the wide body to help in keeping the ball so long in upfront. Some candidates have been mentioned, and i prefer him to get Dovbyk, but only if Roma let him leave.
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.
Hope you still remember what make Chelsea coach to release lukaku from Chelsea? he was released base on poor performance and since lukaku join Napoli they have lifted Italian trophy twice that is making people to think there is no one to replace lukaku in Napoli.