When the Argentine took over the club in May 2014, Spurs were often fell short of qualifying for the Champions League.
But Pochettino would soon transform the club into perennial top four finishers.
He even took Spurs to their first Champions League final last season, only for them to be beaten by Liverpool.
But he paid the price for a poor start to the 2019/20 campaign.
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Pochettino was sacked on Tuesday evening with the club languishing in 14th in the Premier League.
Many would have been sad to see him go.
As well as being a fantastic manager, he also came across as a friendly and likeable manager.
Pochettino had a good relationship with his players, emphasised by the Twitter posts dedicated to him by Dele Alli and Harry Kane.
Unfortunately for Pochettino, he was sacked during the international break and did not get the chance to say goodbye to the players.
However, it was reported that he and his backroom staff had left an emotional goodbye note to his players. And that note has now been posted on Twitter.
View it below:
It read: "Big thanks to you all! We can't say goodbye... you will always be in our hearts."
We're not crying, you are.
Pochettino's successor, Jose Mourinho, spoke highly of the 47-year-old in his first press conference as Spurs manager.
"First of all, and I do it with a bit of sadness, I have to speak about Mauricio," said Mourinho, per the Metro.
"I have to congratulate him for the work that he did. I have to share with you what we already shared indoors which is that this club will always be his home, this training ground will always be his training ground.
"He can come when he wants, when he misses the players, when he misses the players that he worked with. The door is always open for him.
"From my experience, tomorrow is another day. He will find happiness again. He will find a great club again, and he will have a great future.
"He gave everything, every day at the club and he will leave with a sad feeling, but a feeling that he did great work.
"So I would just like to say that because it it is what everyone at the club feels about it also. He will always be welcome here."News Now - Sport News