The 19-year old Englishman was coached by Pochettino for a season and a half, earning himself a big money move to Manchester United.
With a series of impressive performances, Shaw cemented his position as one of the most promising young defenders in world football. However, 21-year old Ben Davies - recently signed by Tottenham Hotspur - could also have a claim for this title, and Spurs fans will be hoping that Pochettino can improve their new signing at the same rate as he improved Shaw.
Last season, Shaw played 35 times in the Premier League, whilst Welshman Davies played 34 times - albeit twice as a substitute. Whilst Shaw received the plaudits for impressive defensive displays, it was Davies who outdid him in the key part of the full-back position; the Welsh international won more tackles and interceptions, and committed less fouls than his English counterpart.
However, from an attacking sense, Shaw was the better player. In Pochettino's increasingly energetic system, the full-backs are encouraged to push forward, and the once-capped England international registered 24 shots, 34 key passes and 56 successful dribbles across the season.
Whilst Davies netted twice - and Shaw failed to score even one goal - he was let down by his consistent inability to aid the attack.
The modern day full-back is required to attack as well as he can defend, and Davies will be forced into that with the change in system that he will be forced into. Playing higher up the pitch may conflict with his impressive defensive duties, although one would think that, following two full seasons in the Premier League, he will be prepared for whatever he may face.
With the Argentinian now in charge of Davies at Spurs, the Welshman may uncover a new side to his play - incorporating consistent attacking pressure into the his game.
Despite Danny Rose impressing as an attacker last season, his defensive displays leave much to be desired, and if Davies can improve his all round game, then there is no doubt that he will secure the Spurs left-back spot as his own.