Real Madrid and Barcelona are reportedly involved in a transfer battle for Borussia Dortmund defender Nico Schlotterbeck.
The 25-year-old has developed and honed his craft since he joined Dortmund from Freiburg in the summer of 2022.
Schlotterbeck is now regarded as a key member of the Dortmund squad, as demonstrated by the fact that he has worn the captain's armband in the past four league games.
However, his long-term future at Dortmund is shrouded in uncertainty, having entered the final two years of his contract.
Real Madrid, Barcelona targeting Schlotterbeck
Schlotterbeck's impressive performances and uncertain contract situation have led to links with some of Europe's biggest clubs.
Bayern Munich appear to be leading the race for the defender's signature, while Liverpool have been mentioned as potential suitors, although the Reds reportedly have no 'concrete plans' to sign Schlotterbeck at this current stage.
According to Fichajes, Real Madrid and Barcelona are also in the race to prise the centre-back away from Signal Iduna Park.
The two Clasico rivals seemingly have work to do to steal a march on Bayern, while Dortmund have not given up hope of keeping one of their prized assets.
Dortmund director Lars Ricken recently warned Schlotterbeck that they will not let contract talks drag out indefinitely.
If they fail to agree on a new contract, Dortmund will demand a 'substantial' fee to part ways with Schlotterbeck in 2026.
Why are Real Madrid and Barcelona eyeing defenders?
Real Madrid boss Xabi Alonso may need to bolster his backline in 2026, with David Alaba out of contract at the end of the season.
Antonio Rudiger has also entered the final year of his contract, and it remains to be seen whether he signs a renewal with Los Blancos.
Meanwhile, Barcelona are still searching for a suitable replacement for experienced defender Inigo Martinez, who completed a move to Saudi Arabia in the summer.
Martinez has proven to be a big miss for Hansi Flick this season, and the Blaugrana will be desperate to recruit a new long-term centre-back partner for Pau Cubarsi.