The Morocco midfielder is to join the Blues for a fee of €44m at the end of the season.
And Ajax announced the sale online today, with a statement: "Ajax and Chelsea have reached an agreement for the transfer of Hakim Ziyech. The player will join the Premier League club on July 1st 2020 and will finish the season in Amsterdam. The clubs have agreed a deal of €40 million euros. This sum could potentially increase to a maximum of €44 million, with variable factors.
"The contract of the Moroccan player lasts until the 30th of June 2022. Ziyech was born on March 19, 1993 in Dronten. He made his debut for Ajax on 11 September 2016 in the match against Vitesse (1-0). The Moroccan international has played 160 official matches in the 1st team of Ajax and scored 49 goals.
Ajax (@AFCAjax) February 13, 2020