Chelsea are set to earn an impressive £25 million for defender Kalidou Koulibaly.

The former Napoli centre half signed for the club for slightly more money last summer.

While the Blues will not recoup the entire fee they paid, they are set to earn a significant sum from Al-Hilal in Saudi Arabia.

Per Sky Sports Italy's Gianluca Di Marzio, Koulibaly is close to signing for the Saudi Pro League club.

He may be joined by Edouard Mendy and Hakim Ziyech in the Middle East in the coming weeks.

Both Chelsea stars are being linked with moves to Saudi as part of the nation's heavy investment in their domestic league.