
The 54-year-old, who took Ajax through to the Europa League final against Manchester United in 2017, has signed a contract to 30 June 2020. Bosz will be joined at Leverkusen by his assistant coach Hendrik 'Hendrie' Krüzen.
"Heiko Herrlich gave our team an important boost last year after a very difficult season and he took us into Europe. We were convinced and determined to turn the corner with him as head coach. Unfortunately, there has been an undeniable stagnation in the development of the team. Even though we are within reach of the European positions at the end of the year we find ourselves in a situation after a less than satisfactory first half of the season that makes a change of coach essential from our point of view," said Rudi Völler as sporting managing director in explaining the decision.
"With Peter Bosz as manager we want to get back to meeting our ambitious targets as quickly as possible," declared the Bayer 04 chairman Fernando Carro. "Of course, that is also down to the players. They have to consistently show their undoubted ability, which unfortunately has rarely been evident over the past six months."
In the view of Bayer 04 sporting director Simon Rolfes, Peter Bosz wants to play "Attacking, high tempo and exciting football. He has always demonstrated particular passion in working with young players wherever he has coached. Therefore, Peter is an excellent fit here with us as we have placed great emphasis on developing highly talented youth players and bringing them through to the top level in a balanced combination with experienced pros for many years. Our team will benefit from having Peter Bosz as our coach," declared Rolfes. "Particularly at Ajax, he demonstrated he can improve young players, build teams and also compete on the European stage."

Werkself-TV shows the highlights of the Bayer 04 women's 1-2 loss against VfL Wolfsburg on the 2nd matchday of the Google Pixel Women's Bundesliga 2026/27.
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Bayer 04’s eight opponents in the group stage of the 2026/27 UEFA Europa League have been confirmed. At the draw on Friday 28 August held at the Grimaldi Forum in Monaco, the Werkself were drawn against two opponents from each of the four pots. There are a total of four home and four away matches. Read on for details of opponents and fixture dates.
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In the 3-2 defeat at Bundesliga newcomers SV 07 Elversberg, the Werkself found the back of the net in the closing stages and, with a bit of luck, could still have equalised. “Today, our play wasn’t good enough, particularly when it came to the basics,” said head coach Carles Martínez. Like the boss, Ibrahim Maza also wants to learn from the match and look ahead: “Next week, people should be able to see from the very first minute that we want it more than our opponents.” The Werkself review on the Bundesliga opener in 2026/27.
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Werkself TV shows the highlights of Bayer 04's 2-3 loss at SV 07 Elversberg on Matchday 1 of the 2026/27 Bundesliga season...
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No points to start the league campaign: Bayer 04 lost 3-2 away to newly promoted SV 07 Elversberg in the first Bundesliga match of the 2026/27 campaign. Two quick-fire goals from Lukas Petkov (8’) and Cole Campbell (10’) gave the hosts an early lead, before David Mokwa scored the Saarland side’s third shortly after half-time (46’). In the closing stages, the Werkself rallied and staged a late comeback with goals from Patrik Schick (77’) and Christian Kofane (90+1’), but the Black and Reds were denied an equaliser.
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