Chris Nkumku will return from his knee injury in the second week of November and start playing for the Chelsea squad in the same manner that he did in the team's preseason games.
For the Start, Nkunku and Jackson will be playing separately in matches until the best-performed player takes the front position.
Pochettino has plenty of work to do in utilizing the Chelsea player in terms of finishing and their defense to achieve the goal of reaching the top 4 spot this season
Pochettino really needs alot of work to do and moreover they need new signings let them sign tactical players that will be good in finishing and their defense needs to perform better, most of their matches they either concede early goals or their goals are being equalized so it is the porosity of the defense that is responsible for that so the need more improvement in their defense.
Chris Nkunku returning from injury may not make any difference to the team if they continue with the pattern they've been playing with. Nkunku performance in the preseason may not be as easy in the premier league because most teams doesn't even take preseason seriously as most teams doesn't play their league with same pattern they play in preseason but whichever way it is we hope he brings his best as he's returning from injury.
Chelsea are building or finding a character of the team, so I dont think new signing is the solution for Mauricio Pochettino right now. without solidity, adding more new players could mess up the compactness which is already built. before they sign new players, they need to improve, build a character as a team and maintain the progression. that's the only right way for now, unless they would start rebuilding from basic again.
all the players in the squad more or less are a level in quality, it's a matter of gametimes for them to improve their quality and chemistry in the team which are starting to progress and getting results. Chelsea will be top competitor again if this plan of rebuilding is not having setback, and adding new players will be inevitability needed.