The Catalan giants hold a 1-0 lead in the last 16 tie from the first leg in Lisbon ahead of the clash at the Olympic Stadium.
Barcelona’s La Liga match last Saturday against Osasuna was postponed 20 minutes before kick-off after the 53-year-old doctor died that afternoon.
Flick told a news conference today, saying Carles was a great person, but also a great doctor, and this combination of Ricard Pruna, another club doctor and him was unbelievable for the club and the team.
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Doctor Minarro had been working with different Barcelona sides since 2017, and began working with the men’s football first team a few months ago.
Barcelona beat Benfica 5-4 in Lisbon in the group stage and then again with 10 men for most of the game last week after Pau Cubarsi was sent off.
However, Flick said his squad would not take progress to the quarter-finals as a given, with Benfica beating Juventus on the road in the group stage and thrashing Atletico Madrid at home.