Pochettino: Tough decisions needed to trim 'massive squad'
"At the moment the dynamic is very good, really good guys and they are sharing the time together," he said after the 1-1 draw with Newcastle.
"It is difficult because sometimes in every game three, four, five players cannot play and that is difficult because the mood is difficult.
"It is about creating a squad with good balance and people who have the opportunity to play and can compete for their place.
"That is a big job and challenge for us in the transfer window to build a good relationship and good balance. Then, if players are not happy because they believe they are not going to play, we are going to find a solution with the club and fix the situation.
"What we cannot have is a massive squad, players not involved and then it's going to create a mess in the squad. Maybe less is more and more is less, it is not mathematic. That is why I need to make clear we don't need a big squad.
"We need 22, 23, 24 players with some younger and that's it. I am so sorry because maybe the decision will be tough but we need to build a good and balanced team who want to compete for things."