The 25-year-old is enjoying an impressive run of form with Spurs, and scored the winner in the come-from-behind 2-1 win over Swansea City on Sunday, but he has had to compete with Ben Davies for a starting spot.
Pochettino suggests the former Sunderland loanee has done well to be considered a regular starter after he sat down and spoke at length with the left-back upon his arrival as manager in the summer of 2014.
"We arrived 21 months ago and the first meeting I have with a Tottenham player was with him,"Pochettino said.
"They were on holiday and I called him to come to my office. I was happy and pleased to give him the opportunity to stay here and work with us.
"It is true we are very happy with him showing quality and helping the team.
"It was maybe difficult from the beginning when we arrived but I am very happy for him. The crowd were singing his name.
"When any manager arrives at a new club always the player needs to know the idea.
"My idea was from the beginning to give him the chance to show he has enough quality to play for Tottenham."