
"Mark Flekken has a great wealth of ability that a goalkeeper needs in top-level football today. He has great reflexes, dominates his area well and has enormous reach with his height of 1.95 metres. Mark has an impressive physical presence and in terms of football he was one of the best keepers in the Premier League over the past two years," said Bayer 04 sporting managing director Simon Rolfes. "He knows the Bundesliga from his successful time at Freiburg. The years in England and his role in the Netherlands team have brought Mark a great amount of international experience on top of that. We are very well placed in the goalkeeping position for the team in the coming years," declared Rolfes.
For the Oranje keeper with eight caps, the move to Bayer 04 is "the next and special step in my career. Many games against absolutely world-class players in England have raised the level of my game," said Flekken. "I'm very happy to be able to dedicate my qualities now to a top German club with big national and European targets. I love the Bundesliga and I'm obviously also looking forward to playing for the Werkself in the Champions League."

Flekken returns from England as a seasoned player to Germany where he was a U17 player for Alemannia Aachen. After playing for Greuther Fürth and MSV Duisburg, he signed for SC Freiburg in 2018 where he made his breakthrough. He played 96 games for the Freiburg side and became one of the top goalkeepers in the league, which brought Flekken to the attention of foreign clubs. The model athlete made 74 Premier League appearances for Brentford over two seasons.
Lots of experience from the Premier League and Bundesliga: Mark Flekken profile

Strengthening the Bayer 04 Leverkusen youth teams: Konstantinos Kotsifakis will join the Werkself from Bundesliga 2 club Hertha Berlin for the 2026/27 season, where he will be a permanent member of the Leverkusen U19 coaching set-up. The German-Greek will also take on an operational role in coaching the Bayer 04 Future Team. The 29-year-old was most recently head coach of the U17s at Hertha Berlin.
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Another award for the Bayer 04 head groundsman and staff: After coming top in the 2021/22, 2022/23 and 2024/25 seasons, the BayArena pitch came second in the Bundesliga Pitch of the Year ranking for the 2025/26 season. VfL Wolfsburg secured the top spot this year, with TSG Hoffenheim in third place.
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Opening opponents, derby weekends, the opponents in the season finale: This information and more will be available to Bayer 04 fans on Thursday, 2 July, when the 2026/27 Bundesliga fixture list is published.
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The next footballing highlight is just around the corner: the 2026 FIFA World Cup, the 23rd edition of the tournament, will be held in the USA, Canada and Mexico and feature 48 teams for the first time. Bayer04.de has all the latest on the Werkself players called up to represent their countries.
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While the majority of the Bayer 04 Women are enjoying their summer break, nine Werkself players will be on duty for their national teams in the coming days. Three of them are competing for a place at the World Cup, while six are involved in two friendlies with the Germany U23 team.
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