
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.”

Werkself-TV shows the highlights of the Bayer 04 women's 0-1 loss at Eintracht Frankfurt on the 17th matchday of the Google Pixel Frauen-Bundesliga 2025/26.
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Bayer 04 have a score to settle with Borussia Mönchengladbach after their late equaliser in the reverse fixture. But it’s been a while since the points were shared in this fixture at Borussia-Park, where the Werkself have won their last six visits – their best run ever away at a team in the Bundesliga. Victory in Saturday evening’s game (18:30 CET) would also be the team’s fifth in a row in all competitions and their best run this season, while Gladbach are only just above the bottom three after going four games without a win. Here’s all you need to know ahead of the evening’s encounter in our matchday news.
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After just two points from their last four games, the situation has become trickier for Borussia Mönchengladbach in the bottom third of the table. Only three points separate the Foals from the relegation play-off spot. Coach Eugen Polanski's team is under pressure ahead of the home game against the Werkself on Saturday, 7 February (kick-off: 18:30 CET). The lowdown on our next opponents.
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Ahead of the Bundesliga match at Borussia Mönchengladbach on Saturday, 7 February (kick-off: 18:30 CET), coach Kasper Hjulmand spoke about the strengths of the ‘Foals’ and a new player in his own ranks.
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