Barcelona are reportedly close to agreeing a deal with Chelsea to sign Marcos Alonso, but their chase of Cesar Azpilicueta has become complicated.
Alonso's future at Stamford Bridge has been a talking point this summer due to his eagerness to return to Spain.
Chelsea's defence has been significantly weakened following the departures of centre-back pair Antonio Rudiger and Anders Christiansen.
The defensive exodus could continue next week, with Barcelona hopeful of signing Alonso for £8.6million (10m Euros) according to Sport.
The 31-year-old confirmed he wants to leave Chelsea last month, saying: 'On paper, I have a contract for one more year and that is where we’re at today.