Barcelona kicked off their pre-season campaign on Sunday with a 3-1 win over Vissel Kobe in Japan.
A good win for the Blaugrana came from goals by Eric Garcia, Roony Bardghji and 17-year-old Dro Fernandez.
Roony and Dro were just some of the debutants to feature. New signings Joan Garcia and Marcus Rashford also made their first appearances since moving this summer.
Young left-back Jofre Torrents also enjoyed a dream debut in a game which brought plenty of positives ahead of the new campaign.
Flick’s side are now due to head to South Korea for another two matches.