Messi made the switch to Paris as a free agent earlier this month after Barcelona admitted they wouldn't be able to be to re-sign him due to their ongoing financial dificulties. The Ligue 1 giants swooped in for the Argentine, who is set to make his long-awaited debut for the club, according to Pochettino.
"It's been a very good week for Leo," Pochettino told ESPN Argentina, after his side's 4-2 win over Brest on Friday. "Next week will be a long one, but if all goes well, we hope he can be in the squad and start at a competitive level [against Reims].
"Today was Leo's second training session, a month after the Copa final. The idea is to see how he feels so he can make his debut. Everyone has seen it, Leo has had an amazing reception. He is a special boy and we are a staff that listens to the players and we are going to talk to him to find out what he needs and when he will be ready.
“We already know what Leo is, what he represents. Everything is positive. There is a very good atmosphere in the group and he has adapted very well and very quickly. I’m happy with the way everyone is working"
PSG's trip to Reims is followed by a two-week international break and Pochettino added that the club would not stand in Messi's way if he wishes to link up with the Argentina national team ahead of their Qatar 2022 World Cup qualifiers next month.
"I have not yet spoken with the selectors," he said. "But they know that I am pro-selection and that we are to help not only Argentina, but all those nations which involve our players."