Kylian Mbappe came off the bench to score a hat trick as Paris Saint-Germain extended its perfect record in Group A of the Champions League with a 5-0 win at Club Brugge on Tuesday.

With nine points from three matches and a five-point lead over second-place Real Madrid, PSG made a big step toward the knockout stage as it ended the Belgian's side unbeaten run this season.

Not fit enough to play the full 90 minutes, Mbappe replaced Eric Choupo-Mouting in the 52nd minute and scored just nine minutes later to make it 2-0 after Mauro Icardi put the visitors ahead with a first-half-goal.

Teammates celebrate after PSG's Mauro Icardi scored the opening goal of the match during a Champions League Group A soccer match between Club Brugge and Paris Saint Germain at the Jan Breydel stadium in Bruges, Belgium, Tuesday, Oct. 22, 2019. (AP PhotoFrancisco Seco)

Teammates celebrate after PSG's Mauro Icardi scored the opening goal of the match during a Champions League Group A soccer match between Club Brugge and Paris Saint Germain at the Jan Breydel stadium in Bruges, Belgium, Tuesday, Oct. 22, 2019. (AP PhotoFrancisco Seco)

Mbappe, who had yet to score in the Champions League this season, then set up Icardi in the 63rd before adding two late goals for his hat trick.

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PSG's Mauro Icardi, center, is congratulated after scoring the opening goal of the match during a Champions League Group A soccer match between Club Brugge and Paris Saint Germain at the Jan Breydel stadium in Bruges, Belgium, Tuesday, Oct. 22, 2019. (AP PhotoFrancisco Seco)

PSG's Mauro Icardi, center, is congratulated after scoring the opening goal of the match during a Champions League Group A soccer match between Club Brugge and Paris Saint Germain at the Jan Breydel stadium in Bruges, Belgium, Tuesday, Oct. 22, 2019. (AP PhotoFrancisco Seco)