Chelsea owners BlueCo are monitoring Sevilla's 18-year-old Spanish central midfielder Nico Guillen. Guillen has attracted the attention of scouts, having already made a start in LaLiga for the senior team this season, although he primarily features for the reserves. His contract with Sevilla runs until 2029, and he has been capped five times for Spain's U19 team. Guillen's current Transfermarkt market value is €1.00m.