He had taken his trusted quartet of assistants with him to Paris Saint-Germain, including his son Sebastiano.
Miguel D’Agostino (first-team coach), Jesus Pérez (performance), Toni Jimenez (goalkeeper coach) and his son Sebastiano (sports scientist).
D’Agostino, Pérez and Jimenez have worked with Pochettino throughout his managerial career, at Espanyol, Southampton and Tottenham.
Speaking in November 2018, Pérez explained:
“He (Pochettino) is very close with us. He's a very uncommon manager, because I've had experience with other ones and they've been different. If he discusses a new contract then first it's our contract and then afterwards his contract. Things like that mean so much. He never puts himself first.”
The trio have long links with the manager. Argentine D’Agostino played alongside him at Newell’s Old Boys, Jimenez was a team-mate at Espanyol, and Perez joined him as an analyst at the Spanish club at the start of his managerial career.
Ben Rosen, now the first-team fitness coach at Copenhagen, worked with the quartet at Southampton and
told TGG:
“There is a lot of loyalty both ways between Mauricio and his three assistants. He was with them at Espanyol and also took them to Southampton and Spurs. I think they’ll be together as long as Mauricio is a manager."
https://trainingground.guru/articles/pochettino-takes-trusted-quartet-of-assistants-to-psg