Strange that many people talk about Lukaku being needed by Juventus, but don't talk about Lukaku not being needed by Chelsea or Inter. The impression is that Lukaku is not attracting interest from big clubs at the moment and it will probably be difficult for him to continue his career. If he was a sought after player, Chelsea probably wouldn't have agreed to a deal.
And it also doesn't make sense for a team to reject the best players, basically they need the best players for next season. Actually, Chelsea is in need of a young player whose talent is not much different from Lukaku, while Inter Milan and Juventus are still hoping to get Lukaku because they have also seen how Lukaku played last season in the Inter Milan team. So actually Chelsea also didn't reject Lukaku, it's just that they might need a younger player than Lukaku.