Riqui Puig started his second La Liga game for Barcelona on Saturday as the Catalans lost 2-0 to Celta Vigo having wrapped up the title last week.
Puig was happy with his display and the team's showing, despite the fact they lost their third league game of the campaign.
"You have to take advantage of the opportunities you get, but it's always annoying to leave and it doesn't leave a good taste," the midfielder said.
"It wasn't to be, but we're happy, because we dominated in the first half, with two really clear chances, although after the goal they got on top and we didn't react after the second goal."
With La Liga won and the focus on the Champions League, Ernesto Valverde is able to give chances to some of the better youngsters in Barça B. Moussa Wague and Alex Collado also featured.
"It's good that players from the B team are getting chances," Puig added. "Valverde's a crack as a manager and gives me a lot of advice. It's difficult to manage this dressing room and he's doing it really well."