Beşiktaş is one of several clubs observing Köln's German midfielder, Eric Martel. Celtic, Stuttgart, and Fiorentina have also been named as interested. Martel, who is 23 years old and has 30 caps for the Germany U21 team, is considered a realistic option for the summer transfer window because he is in the final year of his contract. This season in the Bundesliga, Martel has played regularly, making 27 appearances with 2 goals and 2 assists. He has primarily played as a holding midfielder but has also played in defence when required. According to Transfermarkt, his current market value is €8.00m.