
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.

New signing Miguel Gutiérrez arrives in Leverkusen having won the Champions League, the Spanish league title and an Olympic gold medal. However, the 25-year-old Spaniard, signed from Napoli, is looking to the future – he wants to write the next chapter of success with the Werkself. Bayer04.de takes a closer look at the skilful, attack-minded left-back, who will wear the number 3 jersey.
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The Werkself's training camp in Weimarer Land all in one place: in our daily blog you'll find all the insights and updates from the day. Day three (Tuesday 4 August) begins with a thorough open session on the pitch. After lunch, some players have media engagements at the team hotel, and then the team come together for a barbecue in the evening.
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Nine matches against teams from nine countries, two penalty shoot-outs won, and encounters that went far beyond football: As with last year, the Inklusionswerkself enjoyed an extraordinary week at the Genuine Cup 2026 in Houston, USA, and made memories that will last a lifetime. This year, the Leverkusen side took part as Germany’s official representatives and, accordingly, took to the pitch in Germany kit. Together with 53 teams from 53 nations, the Black and Reds once again sent a powerful message of inclusion and participation – and also impressed on the pitch by winning their group.
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The Werkself training camp in the Weimarer Land all in one place: in our daily blog, you’ll find all the insights and updates from the day. The programme for day two (Monday, 3 August) centres on two training sessions – one in the morning (open to the public) and one in the early evening (behind closed doors) – at the nearby training grounds. In the afternoon, fans can look forward to a big fan meet-up with club legend Paulo Sergio at Schloss Blankenhain.
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