Paris Saint-Germain head coach Mauricio Pochettino admitted that his star-studded squad is still under construction, on the eve of hosting Manchester City in their Group A match in Paris on Tuesday.
Pochettino remained evasive about who is PSG first-choice goalkeeper and whether Keylor Navas or new signing Gianluigi Donnarumma will start against City.
Up front, Pochettino expects Lionel Messi to return in attack as the Argentine shakes off a minor knee injury that sidelined him for two games.
Messi's last Champions League goal for Barcelona came against Paris Saint-Germain at Parc des Princes in last season's last-16. He had a penalty saved in that game by Navas.
Paris Saint-Germain opened their Champions League campaign with a disappointing 1-1 draw with Club Brugge two weeks ago.