What happened?

FC Koln received official confirmation on July 5 2026 that right‑back Rasmus Carstensen (25) is moving permanently to Aarhus GF. The Dane returns to his home after a loan spell and a championship in Denmark. In Cologne he made 28 appearances before a short loan to Lech Posen in January 2025.

Why does this matter for FC Koln?

The departure creates a gap in FC Koln's defence. Carstensen had quickly become a regular after his loan return and was signed on a permanent deal in summer 2023. Manager Steffen Barclay now must find a replacement before the summer training camp begins on July 15. Defensive options are limited, adding pressure to the transfer window.

What does Thomas Kessler say?

Club director Thomas Kessler described the deal: “The loan worked perfectly for Rasmus. He established himself as a starter in Denmark and finished the season as Danish champion.” Kessler stressed that the agreement was “fair” and that Carstensen wants to continue playing in his homeland.

What’s next for Carstensen?

At Aarhus GF Carstensen is expected to slot straight into the starting eleven. The club has just won the Danish title and will rely on his Bundesliga experience. Carstensen added: “I’m grateful for my time in Cologne and look forward to playing permanently in my home country.” For FC Koln the question remains which player will fill the vacant spot – a storyline that will fuel upcoming transfer rumors.