Moussa Diaby has officially returned to Bayer Leverkusen. The German club announced on 1 September 2026 that it had reached an agreement with Al-Ittihad for the French forward's transfer.\n\nDiaby has signed a contract through 30 June 2031 and will again wear the No.19 shirt. He previously represented Leverkusen from 2019 to 2023 before moving to Aston Villa and later Saudi Arabia.\n\nBayer Leverkusen did not disclose the transfer fee, salary or any potential bonuses. Only the transfer, contract end date and squad number are therefore treated as confirmed.\n\nSTATUS: OFFICIAL — the return, contract through 2031 and No.19 shirt are confirmed by Bayer Leverkusen; the financial terms have not been published.\n\nSOURCE: Bayer Leverkusen, 1 September 2026 — https://www.bayer04.de/en-us/news/bayer04/bayer-04-bring-back-star-striker-moussa-diaby