
"Panagiotis Retsos had several offers from top clubs playing in Europe this season. That makes it even more gratifying for us that he decided to sign for Bayer 04 Leverkusen – particularly as he played a key role in Olympiakos qualifying for the Champions League," said Bayer 04 sporting director Rudi Völler. "Panagiotis is a young pro with special talents and he fits in perfectly with our requirements. He represents an investment in the future of the club."
The 19-year-old became the youngest-ever captain of the reigning Greek champions at the age of 18 years, five months and 30 days. Retsos mainly played in central defence for Olympiakos. The right-footer, who joins the Greece national team under coach Michael Skibbe on Thursday night for the World Cup qualifier against Estonia, can also play on the flanks. "Bayer Leverkusen have always played in the Champions League in recent years despite strong domestic competition and that really impressed me," said Retsos. "The offer from a club like this makes me proud and, of course, I'm really looking forward to playing in the Bundesliga – for me one of the best and most attractive leagues in Europe."
In Panagiotis Retsos the Werkself coach Heiko Herrlich now has a player "who was at the top of our list. It's good the club management have been able to conclude a successful move," said Herrlich. "It wasn't easy as such a talented lad like Panagiotis is very much in demand. I'm very happy that we were able to complete the deal."

Midfielder Ruby Grant is leaving Bayer 04 Leverkusen and joining Portuguese runners-up Sporting CP a year before her contract expires. The 24-year-old has been at the Werkself since January 2025.
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Bayer 04 have loaned Brazilian full-back Arthur to Bundesliga side Werder Bremen for one year. Arthur Augusto de Matos Soares – the full name of the right-back – has a contract with Leverkusen until 30 June 2031. At Werder, the 23-year-old is expected to make an impact and help the long-established club further consolidate their position in the Bundesliga.
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Bayer 04 have loaned defender Jeanuel Belocian to Spanish top-flight side Racing Santander. The 21-year-old defender joins the team currently ninth in La Liga until the end of the current 2026/27 season. Belocian’s contract remains valid until 30 June 2029. Last season, the 1.86-metre-tall U21 international was loaned to VfL Wolfsburg for six months.
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He knows the dressing room, the pitch and the club. But, above all, he knows the feeling of playing for the Werkself at the BayArena: Moussa Diaby is back in Leverkusen after three years. The lightning-fast winger has signed a contract with Bayer 04 until 2031 and he will once again wear the number 19 jersey. The left-footed player previously played for the club from 2019 to 2023, having arrived in the Rhineland from his native France as a promising young talent and eventually leaving the club – having established himself as one of the Bundesliga’s best attackers – to join Aston Villa in the Premier League. Now he has returned to Bayer 04 from Al-Ittihad FC in Saudi Arabia.
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