La Liga champions Barcelona are in the market for reinforcements ahead of the start of the 2026-27 season.

The Spanish giants are interested in RB Leipzig defender Castello Lukeba, according to SPORT.

The young Frenchman is one of the leading targets of Sporting Director Deco if the club decides to bring in a centre-back this summer.

His stylistic and physical fit with Barcelona makes him an attractive option, even if he has a pricey €80 million release clause.

Barcelona Identify Castello Lukeba as Defensive Transfer Target

Barcelona are keeping tabs on Leipzig star Castello Lukeba as they weigh up defensive reinforcement this summer.

The 23-year-old Frenchman has steadily developed in Germany since moving from Olympique Lyon, and is one of the best ball-playing centre-backs in the Bundesliga.

La Blaugrana have him in their sights as they consider bringing in another central defender this summer.

His release clause may be a problem, particularly as Leipzig are historically tough negotiators.

The Spanish giants are scrambling to sign a striker and Rodri, and may not have the funds required to bring in the French defender.

Why Castello Lukeba Fits Hansi Flick’s Barcelona System

Barcelona manager Hansi Flick could benefit from signing Castello Lukeba, whose style fits the Spanish side's system.

Flick's side operates a very high defensive line that requires defenders to be able to cover the ground easily while running back.

Lukeba is blessed with top-tier acceleration and recovery speed, allowing him to recover quickly and deal with dangerous attacks.

Also, the Frenchman will provide a natural left-footed option at the back, exploiting passing angles better and helping his side to beat the first line of the opposition press.

Last season, left-back Gerard Martin filled the position after Inigo Martinez left the club, but he is not a natural centre-back and Barcelona's build-up often suffered as a result.

Playing in the intense, high-octane Red Bull system at Leipzig has trained Lukeba on playing with the kind of intensity Flick asks of his Barcelona team.

He is a proactive defender and is usually willing to jump on opponents, rather than retreat and defend his box.

Flick had Ronald Araujo, whose aggression was evident in how he played, but the Uruguayan's fitness-related problems and lack of composure in build-up ensured that he did not fit into Flick's best team.

Why Barcelona Could Struggle to Afford Lukeba’s €80m Release Clause

Die Roten Bullen hold all the cards in this scenario, with Lukeba's contract with them set to run until 2029.

As a result of this, the German side are under no pressure to sell him at a price that would be unfavourable to them.

If they intend to get a deal done for Lukeba, Barca would have to cough up his entire €80m release clause, a daunting task for the club.

Alternatively, they could try to negotiate with Leipzig to find a fee and payment structure that would be favourable to both parties.

In addition to this, they would need to ensure that any deal complies with La Liga's financial regulations.