Chelsea are in contact with Barcelona left-back Alejandro Balde.
Mundo Deportivo says the Blues have been following the teen left-back for at least 18 months.
With Barca looking to land Marcos Alonso from Stamford Bridge, Chelsea could demand Balde in return.
read also:Man City and Barcelona to meet in August
The 18-year-old played five times for Barcelona this season after joining their academy in 2011.
Balde has just two years to run on his current Nou Camp deal.
And the potential arrival of Alonso threatens to restrict his minutes even further.