Barcelona look to make it eight wins from eight on Saturday but found themselves two goals down to Osasuna after 28 minutes.
Manager Hansi Flick made a handful of changes, and plenty of young talent earned a starting nod. But perhaps that decision has come back to bite him.
Raphinha and Lamine Yamal are on the bench, while names like Pau Víctor, Pablo Torre, Gerard Martín, Pau Cubarsí and Sergi Domínguez earned a nod.
The centre-back pairing of 17-year-old Cubarsí and 19-year-old Domínguez allowed Ante Budimir and Bryan Zaragoza to each find the net.
By the 40-minute mark, Barcelona had registered zero shots despite 73% possession of the ball.
Osasuna have lost their last five LaLiga games against the Blaugrana. Will they halt that stat tonight?
