Pochettino's belief is strengthened by Tottenham's success in persuading a number of key players, including England striker Harry Kane - the World Cup golden boot victor - to sign new contracts.
Labour MP and Spurs fan David Lammy, a champion of the anti-Brexit campaign group Best for Britain, said that Premier League clubs were "being forced to pay a colossal Brexit tax in this transfer window thanks to the pound's slump".
Spurs regained control after conceding, however, and the Magpies struggled to get the ball into the feet of their attacking players, with Mohamed Diame particularly sloppy on the ball.
"If we are happy with our squad and can not improve our squad, sometimes it's better to keep our squad together". You know me. It's not because they were at the World Cup that they are going to play in the team.
For Spurs, Eric Dier was booked and struggled to get a foothold in the game, and though Harry Kane was forced extremely deep, the Golden Boot victor battled hard.
The gong could have also been awarded to Jan Vertonghen, but it was apt that England midfielder Alli scored the victor after a busy summer.
In fact, he made the most number of defensive actions than any other player in the game with five tackles, three interceptions and ten clearances.