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"We are looking forward to the first of at least four busy weeks. Sometimes it's good if you don't have so much time and simply keep on playing the whole time," said Alonso at the start of the press conference. The Spaniard did sound a warning: "We will have problems if we are not 100% on our game against Mainz tomorrow."
The opponents, who have conceded the second least number of goals in the league, are in top form: "They are currently in very good shape. They are very brave on the ball and play with great energy." At the same time, Mainz are also well organised in defence: "They have a fine feeling for when they need to press high when they need to sit back. They've shown that several times against top teams as for example against Bayern Munich and Borussia Dortmund."
Jeanuel Belocian (torn cruciate), Amine Adli and Victor Boniface are still unavailable. Alonso: "Adli can be back with the team by the end of January at the earliest, Boniface could return in the coming week but he needs time to train."
Alonso also had words of praise for Boniface’s fellow striker Patrik Schick: "He not only scores goals but also knows how to defend and knows what a great influence that has on our game." The coach was also positive about defender Piero Hincapie, who set up Schick in the 3-2 win at Borussia Dortmund: "We are very happy with his development. He's a real fighter regardless of position and I'm glad he finally provided an assist for Patrik. He's practiced that in training for a long time."
The home section will be sold out on Tuesday night and 1700 visiting fans are expected to travel from Mainz. There are still a few tickets in circulation on the official Bayer 04 ticket exchange .

Standing on the pitch where the Werkself players perform - for many Bayer 04 club members, this wish became reality at this year's Members' kickabout. Around 400 active participants of all ages took the opportunity to experience the BayArena from a new and special perspective. And there was also plenty going on in the stands: The event attracted more than 1,000 visitors in total and provided an atmospheric end to the season.
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Lying third in the Bundesliga, the Werkself made a faltering start in 2026 after the winter break, but gradually rediscovered winning ways and, as in the previous campaign, were among the top 16 in Europe and the top four in the DFB Pokal. In the Bundesliga, the Werkself also remained in the race for Champions League qualification right to the end. However, because setbacks repeatedly crept into the Werkself's performances between good displays and crucial games, it was not quite enough to secure a UCL spot in the end. A season with many ups and downs brought sixth place and qualification for the UEFA Europa League. Part II of the review of the 2025/26 season.
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Rogier Meijer is leaving Bayer 04 Leverkusen and returning to his native Netherlands: The 44-year-old will take over at Eredivisie club Sparta Rotterdam on 1 July. Meijer has been part of the Werkself coaching set-up since the start of the 2025/26 season - first as assistant coach to Erik ten Hag, then on Kasper Hjulmand's staff.
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Following the final match of the 2025/26 season, the prevailing feeling was naturally one of disappointment after missing out on qualification for the Champions League. The Werkself finished the Bundesliga in sixth place, meaning they'll start the 2026/27 campaign in the Europa League. "But to talk negatively about everything now because of that would be wrong," stressed captain Robert Andrich following the final game, knowing that the past year at Bayer 04 was marked, more than almost any other, by the start of a new era and the courage to change – and in particular, the belief in a positive direction. Everyone was aware this process would need time. The first part of the 2025/26 season review.
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