Nicolas Jackson finished his medical at Chelsea ahead of a proposed move from Villarreal.
Chelsea paid the 22-year-old forward’s release clause just over €35million.
The Athletic reported this month that Jackson had agreed personal terms with the west London club.
He is set to become the club’s first signing under new boss Mauricio Pochettino.
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Jackson joined Villarreal in 2019 and, after progressing through their youth ranks, made his La Liga debut in 2021.
He attracted interest from Southampton and Bournemouth in January, almost joining the latter – as reported by The Athletic.
Jackson scored 13 goals in 38 games last season for Villarreal.
He made his debut for Senegal in November, coming on as a substitute against the Netherlands in the group stage of the World Cup in Qatar.
Chelsea are set for a squad refresh this summer under Pochettino.
Kai Havertz is close to joining Arsenal in a £65m deal, while Mateo Kovacic is close to a move to Manchester City. N’Golo Kante has left to join Saudi Arabian side Al Ittihad.
What can Chelsea expect from Jackson?
Analysis by Thom Harris
Jackson’s unique attribute is mostly his effectiveness in transition, able to combine his muscular frame with close control and a quick turn of pace.
The forward carrying map (see below) outlines his effectiveness in driving forward with the ball. He provided two assists from a pitch-devouring run away to Girona in May, all-but securing European football for Villarreal.
In and around the area, too, Jackson has a clear eye for purpose. Scoring nine times in his last eight La Liga games, only Gabri Veiga has won his goalscoring average more than Jackson’s 4.0, a fine display of finishing ability.
In addition, 36 of the Senegalese’s 41 shots came from inside the area, highlighting his poaching abilities.
(Image: Getty Images)