Brendan Rodgers’s side failed to pick up a single point from the Group B game, as they went down 5-0 at home.
The Hoops will take on Old Firm rivals Rangers at Ibrox in the Scottish Premiership next weekend.
Cardoso, who joined Pedro Caixinha's Rangers from Vitoria Setubal in the summer transfer window, has revealed that he watched the match between Celtic and PSG.
“I watched that game to learn things about Celtic, although it’s hard to play against one of the best teams in the world,” Cardoso told The Scottish Sun.
“I learned the same thing I learned again with Rangers on Friday night against Partick Thistle — that we have to control the game, that sometimes we have to suffer as a team, and then kill the game.”
Celtic are in better form than Rangers at the moment and also have a better squad.
Despite next weekend’s game being held at Ibrox, the Hoops will head into the match as favourites.
Rangers, though, do have it in themselves to find a way to get the better of Celtic, although it is hard to see the Gers register a comprehensive victory over their Old Firm rivals.