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.”
There were celebrations among those in black and red at the RheinEnergieSTADION. On Matchday 9 of the 2026/27 Bundesliga season, the Werkself beat 1. FC Köln 2-0 and registered their sixth successive win in the derby. Aleix Garcia put Bayer 04 in front after just seven minutes with a direct free kick. Leverkusen played with discipline and energy after that and didn't allow some fierce challenges to unsettle them. Patrik Schick made it 2-0 in the 86th minute, and Said El Mala's goal in stoppage time for Köln proved nothing more than consolation. Jonas Hofmann crowned the derby win with his 100th appearance for the club.
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Bayer 04 have won each of their last five competitive encounters with 1. FC Köln, and it's around seven years since their last defeat in the cathedral city. That said, the hosts are in strong form at home and will make it anything but easy for the Werkself at the RheinEnergieSTADION on Sunday afternoon (kick-off 15:30 CET). The Matchday News.
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Werkself-TV shows the highlights of Bayer 04 Women's 2-0 win against Hamburger SV on Matchday 9 of the 2026/27 Google Pixel Women's Bundesliga.
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1. FC Köln host Bayer 04 on Sunday 8 November (kick-off 15:30 CET) in the 75th Bundesliga derby between the Rhineland neighbours. The lowdown on our next opponents.
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