Ahead of the clash with the already safe Mainz, the Dutchman declared: "We don't need to think about what's happening on the pitch at Gladbach. We have to win our game. And then we'll see if that's enough in the end."
In the best-case scenario, the Werkself will be happy to repeat the drama of the final matchday of the 2018/19 league campaign: Back then, the Black and Reds qualified for the Champions League with an emphatic 5-1 win against Hertha Berlin and a 2-0 defeat for Gladbach against Borussia Dortmund. "We showed then what is possible," said Bosz.
Good news: Ahead of the game with Mainz, the 56-year-old coach can select his team from his whole squad with the exception of Aleksandar Dragovic who is currently serving a one-match ban. Karim Bellarabi and captain Lars Bender returned to training with the team on Friday following injury. Bosz explained: "We'll see who plays tomorrow. Our only interest is definitely winning the match."
The team coached by Achim Beierlorzer have already secured their top-flight status with two recent wins at Dortmund (2-0) and fellow relegation candidates Werder Bremen (3-1). Bosz does not believe Mainz will let the season end with a whimper. The Werkself coach commenting on tomorrow's opponents: "They played very well against us in our narrow win earlier in the season (1-0 ed.). Mainz have some interesting players and a good team."
Match information:
Broadcasters: Sky and Werkself Radio (bayer04.de)
Referee: The referee will be announced on the day of the game


Carolin Simon is the new captain of the Bayer 04 women’s team. The full-back, who joined from Bayern Munich in the summer, will take over the captain’s armband for the 2026/27 season. Simon returned to Leverkusen in the summer after ten years away. The 33-year-old succeeds goalkeeper Friederike Repohl, who retired at the end of last season.
Show more
Farid Alfa-Ruprecht is going out on loan from Bayer 04 Leverkusen to Bundesliga 2 side Hertha Berlin. The pacy winger will be at the Berlin club for one year.
Show more
Heading towards the competitive start of the 2026/27 season together: the Werkself kicked off preparations for the DFB Pokal clash at third-tier SV Wehen Wiesbaden with an open session in front of their fans on Tuesday morning. Before the first-round tie on Saturday 22 August at 13:00 CEST - for which the away section is already sold out - there'll be one more open session on Thursday from 11:00 CEST, when fans have another chance to watch head coach Carles Martínez's men at work.
Show more
Bayer 04 host RB Leipzig at the BayArena on matchday 4 of the 2026/27 Bundesliga season. The game is on Sunday 20 September with the kick-off at 15:30 CEST. The latest information on ticket sales.
Show more