Seven players signed for Spurs 12 months ago following the £86m sale of Gareth Bale to Real Madrid, but Pochettino dismissed the idea of a similar overhaul in the coming weeks.
"We have a very good and big squad," he is quoted as saying by football365.com. "Last summer the club made a big effort during the window and I believe in these players. We are always looking to improve but we don't expect big change.
"It's a different club to Southampton. Tottenham is a bigger club and we need to win, but not only win, we need to create a good philosophy. Our philosophy is exciting football, pressing attacking football.
"This is our target for the moment. During the season the targets will come."