Moussa Diaby returns to Bundesliga action for Bayer 04 Leverkusen on September 5, 2026, facing his favourite opponent, Union Berlin. The Saturday match at 15:30, broadcast live on Sky, marks Diaby's first appearance for Bayer since May 2023. The 27-year-old has scored five career goals against the Berlin side, more than against any other club. Union Berlin currently sits 9th in the Bundesliga standings with one point from one match.
Why is Union Berlin Diaby's favourite opponent?
Moussa Diaby's record against Union Berlin is telling. The winger has scored five goals against them, a tally he only matches against Augsburg. This history makes Saturday's encounter a special one for the returning player. Diaby moved back to Bayer 04 from Al-Ittihad this summer and is now expected to inject new energy into a team that has scored three and conceded three goals this season. Bayer is two points behind league leaders Bayern Munich in the title race.
What does coach Carles Martínez say about Diaby's return?
Bayer coach Carles Martínez expressed confidence ahead of the match. "Moussa is ready and has trained well." the 42-year-old told Bild Sport. Martínez emphasised the player's importance to his system. "He is very important, above all because of his footballing quality."
The coach also highlighted Diaby's strong left foot, which allows him to cut inside, create chances, and finish. According to Martínez, the Frenchman can also operate in central positions and link up well towards goal. His ability to provide assists and score himself will be important against Union.
How does Martínez assess Bayer's current situation?
Carles Martínez also addressed the 2-3 defeat to Elversberg, his first league match as Bayer coach. He admitted he wasn't surprised by the loss but was saddened because the team failed to perform well despite a week of preparation. "The most important thing in life is to learn from mistakes," said Martínez. He stressed that the heavy defeat is in the past and the focus is now forward. The team needs to recover quickly, as the next Bundesliga home game isn't until November 21st against currently fourth-placed RB Leipzig. The full schedule can be found on our fixtures page.
What role does Diaby play in the first-team squad?
Moussa Diaby's return comes at an ideal time. After a draw to start the season and a zero goal difference, Bayer Leverkusen urgently needs more firepower in attack. Diaby's pace and direct style of play offer a new option. Coach Martínez can deploy him on either wing or through the centre, benefiting tactical flexibility. His last game for Bayer was a 0-3 loss in Bochum on May 27, 2023, a streak he now aims to help end. Detailed performance data for all players is available in our stats overview.
The home match against RB Leipzig on November 21, 2026, is Bayer 04 Leverkusen's next Bundesliga fixture after the Union game.
