Barcelona's Dani Olmo celebrates his side's fourth goal during a Champions League phase soccer matchday 5 between Barcelona and Brest at the Lluis Companys Olympic Stadium in Barcelona, Spain.

Barcelona's Jules Kounde jumps for the ball during a Champions League phase soccer matchday 5 between Barcelona and Brest at the Lluis Companys Olympic Stadium in Barcelona, Spain.

Barcelona's Robert Lewandowski celebrates his side's third goal during a Champions League phase soccer matchday 5 between Barcelona and Brest at the Lluis Companys Olympic Stadium in Barcelona, Spain.

Barcelona's Pablo Torre reacts during a Champions League phase soccer matchday 5 between Barcelona and Brest at the Lluis Companys Olympic Stadium in Barcelona, Spain.

Barcelona's Dani Olmo scores his side's second goal during a Champions League phase soccer matchday 5 between Barcelona and Brest at the Lluis Companys Olympic Stadium in Barcelona, Spain.

Barcelona's Robert Lewandowski jumps for the ball against Brest's Brendan Chardonnet during a Champions League phase soccer matchday 5 between Barcelona and Brest at the Lluis Companys Olympic Stadium in Barcelona, Spain.

Barcelona's Ferran Torres fights for the ball against Brest's Hugo Magnetti during a Champions League phase soccer matchday 5 between Barcelona and Brest at the Lluis Companys Olympic Stadium in Barcelona, Spain.

Barcelona's Robert Lewandowski celebrates after scoring his team's first goal during a Champions League phase soccer matchday 5 between Barcelona and Brest at the Lluis Companys Olympic Stadium in Barcelona, Spain.

Barcelona's Fermin Lopez tries to score a goal to Brest's goalkeeper Marco Bizot during a Champions League phase soccer matchday 5 between Barcelona and Brest at the Lluis Companys Olympic Stadium in Barcelona, Spain.

Brest's Hugo Magnetti fights for the ball against Barcelona's Raphinha during a Champions League phase soccer matchday 5 between Barcelona and Brest at the Lluis Companys Olympic Stadium in Barcelona, Spain.