
The 18-year-old has worn the Black and Red shirt since 2013 and he has made 16 appearances for the Bayer 04 U19s in the current U19 Bundesliga West campaign. He has also been very much in demand with the Germany youth teams. Boller (pictured above in the middle with Lucas Alario and Sam Schreck in the game at Heidenheim) has earned 15 caps for the Germany U17 team and he was a first choice in central defence at the 2017 European Championships in Croatia as well as the World Cup in the same year in India. He played alongside Kai Havertz in the Bayer 04 U17s in 2016 when they won the Germany U17 championships with a 2-0 victory over Borussia Dortmund in the final.

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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After back-to-back away defeats, Bayer 04 Women now face their penultimate home fixture of 2026 as they welcome Hamburg to the Ulrich-Haberland-Stadion on Saturday (14:00 CET) seeking three important points in the Google Pixel Bundesliga.
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It was a UEFA Europa League fixture that came down to fine margins as Bayer 04 ultimately ended up on the wrong side of a one-goal game at home to Marseille on Thursday – the Werkself’s first loss of the European campaign. However, Leverkusen are still well on track to reach the knockout rounds with nine points on the board at the league phase’s halfway stage. Still, Carles Martínez and his team want to learn from the loss heading into Sunday’s Bundesliga derby at Köln.
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Several Werkself players are set to represent their national teams during the final international break of 2026. Here’s an overview of who has been called up and what matches they will face in November. This article will be updated regularly.
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Werkself TV shows the highlights of Bayer 04's 0-1 loss against Olympique Marseille on Matchday 4 of the 2026/27 Europa League season...
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