The two recent poor performances are still in mind and the disappointment suitably great. “But now we have the next game straight away. On the one hand, it’s good to be playing again so quickly but, on the other, we don’t have much time to prepare,” said Bosz at the pre-match press conference. His team has to rediscover the form shown in the games against Bayern Munich, Schalke 04 and Juventus. Bosz: “Those games proved we can do better. We have to perform like that again tomorrow.”
The next opponents for Bayer 04 have just gone through the first change of coaches this term: Nine points from eleven games saw the departure of Sandro Schwarz and his successor Achim Beierlorzer (formerly at FC Köln) has secured three wins in his first five matches in charge – including the 5-1 victory over Hoffenheim and the 5-0 win at Werder Bremen. “Those are good results. We can expect a tough but very interesting game,”, said Bosz.
After the recent defeats, there was criticism of Bayer 04 playmaker Kai Havertz. His substitution in the home game Hertha was met with jeers from some members of the crowd of the BayArena. “I can’t understand it. Since I’ve been here, people have talked about the Bayer 04 family. For me, that is the fans, players and staff. Everybody together. There were a few people who booed but it wasn’t the whole stadium. But I would never have a go at my family. It doesn’t help the team,” declared Bosz.
The Dutchman added: “The lad is from our own youth teams and he’s already given this club so much – although he is still very young. He can have a bad game. I told him that when he gets back on track – and I’m convinced of that –, he will be stronger than before.”
1,600 travelling fans will support the Werkself in the last game of the year. Bosz, who will choose his squad after the final pre-match training session, concluded: “Tomorrow we have the chance to partly make amends. The points are important if we want to moving up before Christmas. We’ll try to win at Mainz.”
Match information:
TV broadcaster: Sky
Referee: Patrick Ittrich
Tickets: Away tickets are sale at the ground from 12.30 CET

Midfielder Ruby Grant is leaving Bayer 04 Leverkusen and joining Portuguese runners-up Sporting CP a year before her contract expires. The 24-year-old has been at the Werkself since January 2025.
Show more
Bayer 04 have loaned Brazilian full-back Arthur to Bundesliga side Werder Bremen for one year. Arthur Augusto de Matos Soares – the full name of the right-back – has a contract with Leverkusen until 30 June 2031. At Werder, the 23-year-old is expected to make an impact and help the long-established club further consolidate their position in the Bundesliga.
Show more
Bayer 04 have loaned defender Jeanuel Belocian to Spanish top-flight side Racing Santander. The 21-year-old defender joins the team currently ninth in La Liga until the end of the current 2026/27 season. Belocian’s contract remains valid until 30 June 2029. Last season, the 1.86-metre-tall U21 international was loaned to VfL Wolfsburg for six months.
Show more
He knows the dressing room, the pitch and the club. But, above all, he knows the feeling of playing for the Werkself at the BayArena: Moussa Diaby is back in Leverkusen after three years. The lightning-fast winger has signed a contract with Bayer 04 until 2031 and he will once again wear the number 19 jersey. The left-footed player previously played for the club from 2019 to 2023, having arrived in the Rhineland from his native France as a promising young talent and eventually leaving the club – having established himself as one of the Bundesliga’s best attackers – to join Aston Villa in the Premier League. Now he has returned to Bayer 04 from Al-Ittihad FC in Saudi Arabia.
Show more