In fact, Nkunku is a striker who can fill that gap, but no one knows exactly what Chelsea needs. Chelsea should be a very good team, but they still don't look good. I think the only way for them to get out of their troubled times will be the coach's attitude towards the players. He should warn them to be a team and remind them where they play.
Chelsea have serious problem this season, not winning games and totally declined in performance, it would take longtime before the club would be able to bounce back to form. Mauricio Pochettino keeps trying his best, attempting to zero contributions, the team is reluctant in performing and position, we're still watching the same old blues last season, absolutely no change in their form under Graham Potter and they're getting worsen in each league game. Concerning Christopher Nkunku, he's a potential attacker for the club, he's confident but unfortunately ruled out for long time, blues will try to adapt without a top striker.
Now Pochettino needs to take big steps with the team. If the players are not aware of this, the person who will make them aware of this should be the coach, right? That's why Pochettino must have an impact on the form of the players in the team. They are still in a very bad situation as they have 1 win in 6 matches. They also lost to Aston Villa. They won't have any matches in Europe this year, so they had to use this as an advantage.