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"The full focus is now on Heidenheim. We need our Bundesliga mindset again, that's of great importance as the league is the most important competition for us," explained Alonso right at the start of the press conference on Friday afternoon. As in every game, the team go into the clash with the newcomers with the highest levels of concentration and maximum respect. "Otherwise we will have problems," said the Spaniard.
The Black and Reds face FC Heidenheim on Sunday for the second time in a competitive match. For most the Werkself players, the team from Baden-Württemberg are a completely new opponent that the team and coach Alonso have to be prepared for: "They are an intense team who we will have to be ready to challenge. We can't be timid and we have to be prepared for every style of play. Heidenheim are particularly dangerous at set pieces and that is still a weakness of ours. We are continuing to work hard on that."
In addition, Alonso explained: "Heidenheim have good energy and huge desire to battle as we could see against Bremen in Dortmund. I remember their promotion match last season – that was crazy." Heidenheim turned the game around against Jahn Regensburg scoring twice in added time to go 3-2 up and thereby seal the first promotion to the Bundesliga in the club's history. "They deserved to be promoted, it wasn't luck. They have passion and play with commitment," said Alonso.
The Spaniard also praised the visitors’ coach Frank Schmidt who has now been in the dugout at Heidenheim for 16 years: "I've got great admiration for him and I look forward to getting to know him on Sunday. Being in a leading position and in such an intense job for so long is unique and not easy. I wish him and his team all the best for the season."
The Werkself can again look forward to huge support at the match against the newly promoted club: the home section is already sold out. The away ticket office will be open on the matchday.
Alonso will again have to manage without Patrick Schick, Arthur as well as Timothy Fosu-Mensah.
For the game on Sunday, Bayer 04 have again organised a traditional family matchday under the motto "Together under the Cross", presented by main sponsor Barmenia. Werkself fans can enjoy family friendly offers and a wide-ranging programme with games and entertainment in and around the BayArena.

A group of about 50 members of the Bayer 04 Football Academy São Paulo visited Leverkusen over the past few days, accompanied by Bayer 04 club legend Paulo Sergio and Luiz Felipe (managing director of academy in São Paulo) for a week full of football, encounters and very special insights. In addition to the Bundesliga away game in Elversberg and the home game against Union Berlin, the visit also featured a joint training session with the Bayer 04 Football Academy in Leverkusen and a tour of the Bayer AG facilities. The guests also gained special insights into the club and the world of Bayer 04.
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The men's clothing retailer LERROS will remain the official fashion and premium partner of Bayer 04 for the current season. As in the past, LERROS will provide the club's men's team, coaching staff and management with high-quality clothing for international trips.
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“Diaby! Diaby! Diaby!” was the cry around the BayArena as the Werkself danced in front of the north stand following their 4-0 win over Union Berlin. Captain Edmond Tapsoba gave his new (and old) teammate a friendly shove forward to take in the acclaim from the fans. The returning Frenchman was typically reserved in thanking the supporters but was clearly emotional about what was happening.
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Bayer 04 produced a dominant and impressive 4-0 win over Union Berlin as they picked up three points in their first home game of the 2026/27 Bundesliga campaign. Exequiel Fernández opened the scoring after only 41 seconds, with Facundo Medina doubling the lead before the half-hour mark. Patrik Schick and Ibrahim Maza continued the procession in the second period, in which Moussa Diaby came on for his first Leverkusen appearance for over three years.
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