Chelsea have signed Senegal forward Nicolas Jackson on an eight-year contract from Villarreal.
The 21-year-old scored 13 goals in 38 appearances for the La Liga side last season, including nine in the final eight league games.
He is the Blues' second summer signing after the £52m deal for France striker Christopher Nkunku from RB Leipzig.
"He is a young player with big potential," said co-sporting directors Laurence Stewart and Paul Winstanley.
Jackson's late-season form, in what was a breakthrough campaign, earned him the La Liga player of the month award for May, helping Villarreal finish fifth in La Liga and qualify for the Europa League.