By SABC Sport
27th June 2023
Senegal captain Koulibaly moved to England last summer from Napoli on a four-year deal in a transfer reported to be worth £34million.
The centre-back went on to make 32 appearances for Chelsea during a difficult season, but has now departed Stamford Bridge.
A club statement read: "We would like to thank Kalidou for his contributions on and off the pitch during his time at Stamford Bridge and wish him well for the next stage of his career."
Koulibaly is not the first Chelsea player to make the move to Saudi Arabia. N'Golo Kante agreed to join Al-Ittihad on a free transfer following the expiration of his deal with the Blues.
A number of high-profile names have moved to the Saudi Professional League during the past six months.
Karim Benzema has already agreed to join Al-Ittihad after 14 seasons at Real Madrid, following Cristiano Ronaldo who moved to Al Nassr from Manchester United in December.
Wolves captain Ruben Neves has also agreed a £47m move to Al-Hilal.
After Koulibaly and Kante, Chelsea outcasts Edouard Mendy, Romelu Lukaku and Pierre-Emerick Aubameyang have also been linked with moves to the Gulf state.