"We want to find good players but also good people. People who share our philosophy, behave well, show respect to the club and their team-mates and supporters; respect the badge.
"This is very important for success. It’s my philosophy. This is the way we want to create a big team here and have success in the future.
"We have spent time to find the right people to give advice and information. It’s hard, it’s true, but we must do it.
"There are a lot of names on the market and it is easy simply to sign a player. But to get the right player, who has respect for the changing room, is our responsibility."
Spurs, who have been linked with a renewed bid for Coventry teenager James Maddison, are now believed to be looking beyond Berahino in their search for a striker.
Basel’s Breel Embolo has been linked with a move to White Hart Lane, although reports in Spain suggest Pochettino has cooled his interest in 20-year-old Barcelona striker Sandro due to the Catalan club’s insistence on inserting a buy-back clause into any deal.