There are too many players there so Chelsea need to make reductions and Pochettino as the new manager there where not as someone involved in buying these players will choose which one he thinks will be suitable as a starting XI and also a reserve so that his team is competitive. Mason Mount has long been rumored to want to leave Chelsea due to dissatisfaction with the wages being earned, with other players still around Chelsea should be able to cover well the place Mason is likely to leave.
Pochettino has been respond this situations that in July he will starting to select unnecessary players in Chelsea and will release them and the names such as Tiemoue Bakayoko, Dujon Sterling and Bryan Fiabema confirmed will leave Chelsea and joining other clubs but it wasn't mentioned who is the next players who possibly will be sell but if i am not mistaken at least Chelsea will sell 12 players this summer and i think this is good news because with the departure of those players it can give space for new players
However recently i just found a rumour that reported Chelsea has reach to personal agreement with Villarreal player Nicolas Jackson and it says Jackson agree moved to Chelsea this summer and recently he was very sharp and onfire because in the last 8 matches Jackson has scores 9 goals and total 13 goals during this season with Villarreal and no wonder if he has successfully to make Pochettino impress to him