Defense
Left-back: Jordi Alba
Given the sale of Junior Firpo and Barcelona's unlikeliness to sign another left-back as a result of their financial constraints, it is safe to conclude that Jordi Alba's spot on the left side of the defense will be unchallenged next season.
The Spaniard is currently firing on all cylinders. He produced a number of eye-catching displays for Spain at the Euros and he'll be looking forward to maintaining that level of performance when the new campaign kicks off.
Center-back: Gerard Pique
Barcelona's chief defense commander will certainly return to the battlefield next season. Pique was one of the first few players to land at Camp Nou last week to kick off preparations for the upcoming campaign. Such is his determination.
With a new young look, the Spaniard appears to be ready for an intense fight to keep his spot in the starting lineup following the rise of Oscar Mingueza and the signing of Eric Garcia from Manchester City. Both players will be fighting for the centre-back role.
Samuel Umtiti and Clement Lenglet could also join the battle but there are doubts over their continuity in the Catalan capital. Reports suggest that Barca are working to get them offloaded this summer.
Center-back: Ronald Araujo
Ronald Araujo enjoyed a massive breakout season at Camp Nou last term. Despite a few injury layoffs, he was, without doubt, the most reliable figure at the heart of the Blaugrana's defense during the campaign.
Every good deed deserves appreciation. The Uruguayan will likely be rewarded with a centre-back spot alongside Gerard Pique next term.
It's nice to learn that Barca lost just two La Liga games that Araujo featured in last season. As per Whoscored.com, the youngster finished the term with an impressive tally of 28 tackles, 22 interceptions and 46 blocks across all competitions.
Right-back: Sergino Dest
It promises to be a huge battle between Sergino Dest and Emerson Royale for the right-back spot next season. Ronald Koeman should be gearing up for a selection headache.
The two defenders enjoyed a splendid outing last season. Emerson made 38 appearances for Real Betis, bagging two goals and four assists for the Spanish side. Dest, meanwhile, recorded three goals and one assist to his name for Barcelona in 44 games.
Given that Emerson just recently switched to Camp Nou recently, Koeman will likely give him some time to adapt. Hence, Dest would most likely get the nod to feature in the right-back spot.