Chelsea have agreed a deal for the STG33.3million signing of Hakim Ziyech from Ajax at the end of the season.
The Blues must now confirm personal terms with the Morocco winger, who will join Chelsea on July 1.
Both Chelsea and Ajax confirmed the deal, with Frank Lampard securing his first signing as Stamford Bridge boss.
Lampard and Chelsea were unable to make any headway on recruitment in the January transfer window, leaving the new boss frustrated not to bolster his squad.
Ziyech was one of Lampard's top targets however, and the Blues have moved quickly to lock down a deal for the 26-year-old.
"Chelsea Football Club has reached an agreement with Ajax to sign Hakim Ziyech this summer," read a Chelsea statement.
"The move is subject to the player agreeing personal terms and he will remain at the Dutch club for the rest of this season."