Chelsea boss Thomas Tuchel is fighting to keep hold of Marcos Alonso.
The fullback has emerged as a target for Barcelona this summer as they seek to strengthen their defensive options.
Barca are on the brink of selling Junior Firpo and see Alonso as ideal competition for veterean left-back Jordi Alba, says Mundo Deportivo.
However, Chelsea boss Tuchel is eager to keep hold of Alonso for the new season.
The German doesn't see Alonso as a first-choice, but a valuable squad member. The former Real Madrid Castilla defender has a deal to 2023.
