The Dutchman and his players had to cope with freezing temperatures during this week's training sessions. "I asked the players and also my coaching staff to keep on moving a lot," said Peter Bosz at the pre-match press conference on Friday with a smile. "That's why the temperature wasn't a problem for us. And it was even very nice in the sunshine."
The 57-year-old was able to welcome Nadiem Amiri back to the training ground this week. The Germany international completed his period of self-isolation following a positive coronavirus test. But Bosz was unwilling to reveal whether the 24-year-old would be in the starting eleven on Saturday. The Dutchman is just happy to have another alternative in offensive midfield ahead of the busy run of fixtures coming up.
Kerem Demirbay has recently played in the position of the sidelined Amiri – and he knew how to impress with his commitment and goal threat. The 27-year-old netted a brace against Stuttgart. Bosz on the left-footer: "Kerem is doing a good job. I particularly like the fact he never complains but always works really hard. In his position you have to score goals – and he's done that. Therefore I'm happy with his development."
The head coach can be equally happy with the performances of the 17-year-old Florian Wirtz. The youngster has been really impressive in the centre of the park for several weeks and he made it 4-2 against VfB Stuttgart with a header – with the Germany assistant coach Marcus Sorg looking on. This Saturday against Mainz 05 sees Germany coach Joachim Löw visit the BayArena. In answer to the question whether he would advise Löw to call up his youngster, Bosz responded with the following words: "Löw will be watching several players. But I can understand why he's also coming to see Florian Wirtz. He's producing consistent performances and has quality."
Like the Werkself, the visitors from Mainz were also able to win their last Bundesliga fixture. FSV picked up the second win in their last three matches with a 1-0 victory over Union Berlin thanks to a penalty from Moussa Niakhaté. Before that, they beat RB Leipzig 3-2.
Mainz are on the rise since the change of coaches with the former Mainz player Bo Svensson now at the helm. The team from Rhinehessen are still in 17th place in the table but the gap to safety has now shrunk to four points under the leadership of the Dane. "They are playing well and getting results. That helps to build confidence," declared Bosz. In spite of the convincing performances by the next opponents, the Werkself will be looking to "continue riding the rollercoaster" against the reinvigorated Mainz team.
Match information:
Broadcasters: Sky and Werks11 Radio
Referee: The match officials will be announced on the day of the game

Bayer 04 Leverkusen will to have manage without forward Eliesse Ben Seghir. The Morocco international suffered a ligament injury in his left ankle before the AFCON final defeat against Senegal (0-1 a.e.t.).
Show more
The VBL Club Championship 2025/26 continues. Tonight, 27 January (live on Twitch and on the Bayer 04 app from 18:00 CET), the Leverkusen eSports team will play the remaining three matches in the online preliminary round of Showdown Four. They are up against FC Kaiserslautern, SC Freiburg and the current club champions and Showdown Three winners RB Leipzig, with whom Bayer 04, club runners-up and Showdown One winners, shared some memorable moments, especially last year. The lowdown on our next opponents.
Show more
Welcome to Leverkusen, Jonas Omlin. Bayer 04 have signed the 32-year-old goalkeeper on loan from Bundesliga side Borussia Mönchengladbach until the end of the season. Managing director sport Simon Rolfes described the Swiss shot stopper, signed by the Werkself in reaction to the long-term absence of first choice keeper Mark Flekken, as an "internationally experienced keeper." Bayer04.de takes a closer look at the new signing, who will wear the number 18 jersey.
Show more
Under the motto ‘Sound of Dreams - #aCROSS Europe 2025/26’, Bayer 04 are turning this season's UEFA Champions League season into a festival. In addition to a Spotify playlist that fans can use to get in the mood for the Champions League nights, there is also a tour pass with stickers for the respective UCL matches exclusively for Bayer 04 Club members. These could be picked up in the respective weeks of the matches. The sticker for the final clash in the league phase (Villarreal, 28 January, 21:00 CET) is now available at the Fanwelt. The competition for all diligent sticker collectors is also now open. Read on for further information.
Show more