Chelsea have 'agreed personal terms with Senegal forward Nicolas Jakcson', reports have claimed.
The 21-year-old, who has played twice for Senegal, scored 13 goals last season in a breakthrough campaign.
He bagged eight in the last nine league games, as the Yellow Submarine finished fifth in the La Liga table.
According to reports in the Athletic, Jackson was being chased by Bournemouth and Southampton in January after making his international debut at the World Cup, but has now attracted a bigger club.
They claim he has 'committed' to joining Stamford Bridge this summer, with the Blues set to agree terms with the Spanish club in the coming weeks.