Between 2014 and 2016 Maas, who played for Arminia Bielefeld and Hertha Berlin in the Bundesliga plus MSV Duisburg in the second division, was assistant coach to the current Bayer 04 head coach Peter Bosz. They were in charge at Dutch club Vitesse Arnhem for a total of 62 games in the Eredivisie. “In Rob Maas, we’ve appointed an innovative and strong-minded assistant coach who fits in really well here. He knows the Bundesliga and has already worked successfully with Peter Bosz. Rob will provide new ideas,” declared sporting director Simon Rolfes.
For Rob Maas, Bayer 04 are “a highly ambitious and very attractive club. That’s not just the perception in Germany but Leverkusen also have an outstanding reputation across Europe,” said Maas. “To be able to work with fellow coaches in developing an extremely exciting team is a fantastic challenge I’m really looking forward to.”
Sandwiched between their UEFA Champions League knockout play-off tie against Olympiacos, Bayer 04 return to Bundesliga action on Saturday with a trip to Union Berlin (kick-off: 15:30 CET). It’s a fixture of contrasting styles, with Leverkusen preferring to control the play while Union look to remain compact and counter. The Berliners are therefore suited to facing top teams, but they have only ever managed to win one of 16 meetings with the Werkself, who are looking for a fifth clean sheet of 2026 but will need to beware the home side’s threat from set pieces. Here’s all you need to know ahead of the game in our matchday news.
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After six wins in seven games, the Werkself will be looking to continue their winning run in the capital at FC Union Berlin. Coach Kasper Hjulmand spoke ahead of the match on Saturday, 21 February (kick-off: 15:30 CET) about defenders, the short preparation time and the condition of the pitch at the Stadion An der Alten Försterei.
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Union Berlin have performed particularly well against the top clubs in the Bundesliga this season with a draw at home to Bayern Munich and wins against VfB Stuttgart and RB Leipzig. This Saturday, 21 February (kick-off: 15:30 CET), the Irons now welcome the Werkself, currently sixth in the table, to the Stadion An der Alten Försterei. And the hosts are in desperate need of a win. The lowdown on our next opponents.
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It took exactly 60 minutes for the Werkself to take the lead through a perfectly finished counter-attack by Patrik Schick in the first leg of the 2025/26 UEFA Champions League play-off at Olympiacos. Referring to the meeting in the league phase and the initially squandered opportunities, coach Kasper Hjulmand said afterwards: "I thought: 'Oh no, déjà-vu.'" But after the opening goal, it took just 144 seconds for the Czech to spark more wild celebrations among those in black and red in the Greek cauldron, when Schick nodded in Alejandro Grimaldo's corner. Much to the delight of the Bayer 04 fans, his teammates and his coach, who had warm words for the striker in the aftermath. The Werkself Review.
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