
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."

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.
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Bayer 04 host SC Freiburg at the BayArena on matchday 6 of the 2026/27 Bundesliga season. The game will be played between 16 and 18 October. The exact kick-off time has yet to be confirmed. The latest information on ticket sales.
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With the European season ticket, fans can follow and support the Werkself on the European stage during the 2026/27 season – and are guaranteed a ticket and a seat for every UEL home match at the BayArena, right up to and including a potential semi-final. In addition, holders of the European season ticket save 20 per cent on each UEL ticket.
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A successful end to pre-season! In their seventh and final friendly of the summer, the Werkself won 2-1 at Newcastle United. After Ibrahim Maza scored inside the first minute, the Magpies equalised shortly before the break. Bayer 04's attacking endeavours in the second half were rewarded in the closing stages through substitute Victor Boniface, making it six wins from seven games in pre-season.
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Bayer 04 Women warmed up for the start of the Bundesliga season with an emphatic 7-0 victory over Belgian top-flight club Standard Liège on Saturday afternoon. Over four periods of 30 minutes, Cornelia Kramer, Lilla Turanyi and Valentina Mädl each netted a brace for the dominant Werkself, after Loreen Bender had opened the scoring. Roberto Pätzold's side kick off their league campaign at RB Leipzig in eight days.
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