Guillem Balague suggests what might end Mauricio Pochettino's Tottenham reign

Mauricio Pochettino, Manager of Tottenham Hotspur speaks to the media during the Tottenham Hotspur Press Conference at Estadio Santiago Bernabeu on October 16, 2017 in Madrid, Spain.

Mauricio Pochettino has established himself as one of the top managers on the planet with his work at Tottenham Hotspur.

Tottenham Hotspur Manager Mauricio Pochettino during the Pre-Season Friendly match between Tottenham Hotspur and Juventus on August 5, 2017 in London, England.

Tottenham have been transformed into genuine Premier League title contenders under the Argentine.

Indeed they have established themselves among the European elite this season with the 3-1 win over Real Madrid evidence that Pochettino's Spurs have really arrived.

With Tottenham's success has come the inevitable speculation over the future of star players such as Harry Kane and Pochettino himself.

Talk of interest from the likes of Real Madrid has some Spurs fans understandably concerned.

But the majority of supporters feel certain Pochettino is in it for the long haul given what can be achieved at the club and the fact he has built a young team from the ground up.

Guillem Balague, Sky Sports journalist talks during day 2 of the Soccerex Global Convention 2016 at Manchester Central Convention Complex on September 27, 2016 in Manchester, England.

However, Spanish football expert Guillem Balague - who was the ghost writer for Pochettino's book Brave New World: Inside Pochettino's Spurs - has suggested on Sky Sports' The Debate that may not be the case given the huge emotional investment the Argentine puts into his work each day.

"The things that annoys everybody at Spurs is that after a good performance the headlines is like 'Harry Kane will he now go to Madrid, or Pochettino will he now go'," Balague said on The Debate.

Mauricio Pochettino, manager of Spurs looks on prior to the Pre-Season Friendly match beween Tottenham Hotspur and Juventus at Wembley Stadium on August 5, 2017 in London, England.

"They are giving absolutely everything to this, him and Jesus and Mickey and Tony of course and everybody involved.

"With that at the end of the day they go (sits back, closes eyes and puffs out his cheeks) 'Yes we've given it everything' and they give that everyday to build success.

"I'm sure at some point it will be like you're seeing with (Diego) Simeone and Atletico Madrid, it's like 'Oh God another year of Simeone (and that intensity)' for the players just not being able to give any more, it may happen absolutely (with Pochettino at Spurs) and the other way around as well because he's investing so much emotionally Pochettino, endless, that he may be tired at some point."

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