
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.”

The FIFA World Cup 2026 in the USA, Canada and Mexico is underway. A total of eight Leverkusen players are taking part in the 23rd World Cup, with 48 teams in the tournament for the first time. Bayer04.de brings you all the latest from Werkself players at the World Cup.
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At the end of June, Bayer 04 became the first team in the Google Pixel Women’s Bundesliga to begin their pre-season preparations. As well as training sessions at the Kurtekotten facility, the players under coach Roberto Pätzold completed the customary series of performance diagnostics. Werkself-TV presents exclusive insights and player interviews from the first few days after the summer break.
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Following their 4–3 opening victory against Denmark, the Germany U19s made it two wins out of two by defeating hosts Wales, securing their place in the semi-finals with a game to spare. In the 4–0 win, Bayer 04 players Montrell Culbreath and Francis Onyeka once again put in impressive performances, with both finding the back of the net.
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Bayer 04 Leverkusen have signed home-grown talent Sana Coskun on professional terms. The 18-year-old midfielder, who made her Bundesliga debut last season, has signed a contract to 30 June 2029.
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