"It's not about adding because it's fashionable to sign players".
Pochettino does accept how the lack of activity might be viewed externally, but is happy with the club's vision.
"Building a new training ground, then finishing the lodge this summer was a massive investment".
Pochettino said: "I don't have news now and to do so before the deadline would be so hard".
"It is hard to understand for people in football that Tottenham didn't sign or didn't sell players but sometimes in football, you need to behave different". [So is] building a stadium that is almost £1 billion - that is true, don't believe £400 million.
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"That maybe looks bad because of the perception and because of the history of football, but that is our decision - to keep the best players and to keep the squad".
Spurs failed to make an addition to their squad over the summer, meaning they will go into the new season with the same squad that finished the last one.
But Pochettino has warned that he will demand full commitment from anyone who is still at the club after the continental window closes.
The Scotland global was a key man during a loan spell at Villa Park last season, but as the Villans hit financial difficulty early this summer, they were unable to put anything in place that allowed them to keep the playmaker.