"Building a stadium that is almost £1bn".
"I think we have a very competitive squad, of course that we are hoping to improve, but if you can not improve the most important thing is trying to keep your best team, your best players".
Spurs were also the only team in Europe's top five leagues and only English professional side not to make a single addition.
The Tottenham boss says that the financial constraints of redeveloping the training facilities and seeing the cost of building the new stadium rise to £1 billion due to Brexit were key factors in their decision not to buy this summer.
Pochettino added: "I am happy to keep all the squad together, there were many rumours during the summer about players out".
Mauricio Pochettino has told Danny Rose, Toby Alderweireld and Mousa Dembele to forget about their futures and concentrate on Tottenham. "It's a fearless decision". "Some people make a drama in football and drama for me is another thing", Pochettino added.
"You saw it with Arsenal when they moved to the Emirates, you can't buy anyone, you have to sell players". Harry Kane committed his future to Tottenham before heading to the World Cup and finishing as the top-scorer as England reached the semifinals.
Asked if Tottenham's players understand the lack of new arrivals, Pochettino responded: "They don't need to understand".
But, although the Argentinian on Thursday conceded the transfer window would probably close without a fresh face arriving, he was adamant it was still a good period for his team. If all the players today are thinking about a collective target, we can be competitive. If we have all the squad thinking as individuals rather than as a collective, you can not achieve what you want and can not succeed.
Toby Alderweireld, Danny Rose and Mousa Dembele were all expected to leave this summer, and they still could if they are willing to move overseas.