
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.”

It has been a long time since feeling what it’s like to come away empty-handed. The last – and so far only – defeat of the season, in Elversberg, was two months ago. Since then, Bayer 04 have followed that up with seven wins and a draw. Now it has happened again away to TSG Hoffenheim. As the match progressed, the Werkself grew in confidence and “could even have scored the opening goal”, as Robert Andrich said after the game. In the end, it was the side from Sinsheim who sealed a 3–0 victory after “hectic closing stages” (kicker). The Werkself review.
Show more
Werkself-TV shows the highlights of Bayer 04 Women's 0-2 loss at 1. FC Nürnberg on Matchday 8 of the 2026/27 Google Pixel Women's Bundesliga.
Show more
Werkself TV shows the highlights of Bayer 04's 0-3 loss at TSG Hoffenheim on Matchday 7 of the 2026/27 Bundesliga season...
Show more
After nine points from their first three away matches of the 2026/27 season, the Bayer 04 Women suffered their first away defeat on Sunday afternoon. The 2-0 defeat away to FC Nürnberg, who were winless before today, represented a setback for coach Roberto Pätzold’s team in the race for the top spots in the Google Pixel Women’s Bundesliga. Fany Pronietz scored both goals (62’, 85’) for the home side.
Show more