
"Mario Hermoso is an experienced player on the international stage and, in addition to playing as a central defender, he is a very capable and organised left back," said Bayer 04 sporting managing director Simon Rolfes in describing the 1.84 metre tall defender. "Mario will also bring additional versatility to our defence and will compensate very well for the absence of Jeanuel Belocian."
Hermoso knows Bayer 04 well having played the Werkself twice in Champions League games in 2022/23. "They were two highly emotional games with neither side giving anything away exactly like it was in Madrid a week or so ago," said Hermoso, who has made five international appearances for Spain. "I'm very much looking forward to aiming to achieve big targets with the Werkself. Everything is set up here for a successful season on the pitch."

The German Football Association (DFB) has officially recognised Bayer 04 as a centre for the development of female talent for the 2026/27 season. The club was awarded that role on 1 January 2026, and this status has now been renewed.
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Bayer 04 Leverkusen have sold young defender Andrea Natali to AZ Alkmaar on permanent terms. The 18-year-old Italian was on loan at the Dutch club last season, where he mainly played for the reserve team in the second division.
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Bayer 04 Leverkusen have loaned new signing Luca Erlein to newly promoted FC Energie Cottbus for the 2026/27 season. This will give him the opportunity to play in Bundesliga 2. The club signed the 19-year-old right-back on a permanent basis last week, on a contract to 30 June 2030.
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Trophies as a youth, appearances in the pro game and his first taste of international competition: new arrival Luca Erlein, who has been signed from TSG Hoffenheim, can already look back on some remarkable achievements and moments in his fledgling career. We take a closer look at the 19-year-old right-back, who can also fill other roles across the defensive line.
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