PSG coach Mauricio Pochettino has branded Thomas Tuchel's Chelsea a "defensive team".
PSG have conceded five goals in Europe this term, while Tuchel's side have let just one past their defence.
"Chelsea have a defensive team, they play in transition and on the counter," Pochettino said. "We have signed two attacking full-backs, Hakimi and Nuno Mendes.
"The club has the ambition of playing attacking football, we are going to have to find the defensive balance that allows us to control the ball well to be able to attack well.
"There is also the recovery side: how to organise after losing the ball, how to get it back under pressure etc.
"It is true, we are conceding a high volume of shots, but that is one of the characteristics of attacking teams, to have full-backs that bomb forward, get into the opposition box.
"We are in a phase of understanding. An example: Hakimi has gone from a wing-back role to playing in a back four. You have to see when to attack, when not to. It takes time."
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