"Of course it's hard to understand for people in football that Tottenham didn't sign or sell players, but sometimes in football you need to behave differently", he said.
Asked if Tottenham's players understand the lack of new arrivals, Pochettino responded: "They don't need to understand".
Tottenham have become the first Premier League club to go an entire summer without signing a single player since the transfer window was created in 2003.
"We have a very good squad, with very good players and it is very hard to add players to that", Pochettino added. I think the club is doing an awesome effort to try to finish the stadium as soon as possible, and the lodge is finished at the training ground. "Building a new training ground, finishing this summer the (player's) lodge was a massive investment".
It's so clear what's going on at the club in the past and present and how we are going to move in the future.
"Building a stadium that is almost £1 billion". Then also with Europe having more time to do deals, it was all so quiet and relaxed.More news: US Will Sanction Russia After UK Nerve Agent Attack
Chairman Daniel Levy has proved his point by refusing to sell to Belgian to another Premier League side, but Spurs still have the option to sell him overseas.
If Spurs decide not to cash in, they must attempt to try and get Alderweireld to commit to a new deal.
But he urged them to knuckle down if they remain for the season, saying: "If all the players today are thinking in a collective target, we can be competitive".
But Pochettino has warned that he will demand full commitment from anyone who is still at the club after the continental window closes.