Ibrahimovic, PSG's marquee summer signing, has scored five goals in Ligue 1 this season, but the Swede is well aware that Tuesday's opening Group A game at home to Dynamo Kiev will be a difficult test.
"We'll see the level difference between the league, any [domestic] league, and the Champions League," Ibrahimovic, who moved from AC Milan, told a news conference on Monday.
"I can already see a difference between the day I came here and now," said Ibrahimovic, who has never won Europe's premium club competition.
"The Champions League is a competition that makes a team become better."
"The quality is here, the potential is here," he said.
"But the Champions League is difficult. It doesn't matter which team you play because even if they are not Barca or Real, they are still good. We do not underestimate anyone in the group. Whether we are the favourites or not is not important."
"We have a lot of experienced players, and also an experienced coach," the Italian, who confirmed that Thiago Silva would start in central defence after overcoming a thigh injury, said with a grin.
Dynamo Kiev should be able to call on forward Andriy Yarmolenko who has shrugged off an injury he picked up during Ukraine's 1-1 draw against England in a World Cup qualifier last week, according to coach Yuriy Syomin.
