In terms of outgoings, they will still be able to loan out players to Football League clubs and can even sell players after Thursday - providing that the buying club is still within their nation's respective transfer window.
Spurs had a £25 million bid rejected for Jack Grealish and decided that the Championship club's valuation of £32 million was too much to pay. For the first time since the summer transfer window was introduced 15 years ago, one team spent nothing: Tottenham.
It is at odds with boss Mauricio Pochettino's perceived wish, where he challenged the club to be "brave and take risks" at the end of last season.
"They return on Monday, trained Monday, Tuesday, Wednesday and today so you can imagine that they are not really fit and ready but we have needs", Mourinho said.
"We have a very good squad, with very good players and it is very hard to add players to that", Pochettino added.
Jurgen Klopp has added midfielders Nabi Keita and Fabinho, forward Xherdan Shaqiri and goalkeeper Alisson to his squad to the tune of £140m.
"It's not about adding because it's fashionable to sign players".
"It's true our targets are always the same level as Manchester United, Manchester City or Real Madrid but for different circumstances we can't achieve that". "I am not anxious, I am not sad, I am so happy".
"So I will have to focus on the players I have and in relation to this first couple of matches, maybe four matches because after Burnley there is national team and a couple of weeks to recover people and prepare people better, is to focus on players available so I'm not thinking about that list I give you, I focus on what we have". Pochettino is adamant Tottenham´s lack of transfer activity isn´t a problem because it was just as important to hold onto the club´s key players. In football, you need time to work and players on the pitch to work and we didn't have until now.
"If we are happy with our squad and can not improve our squad, sometimes it's better to keep our squad together".