FC Koln have completed the signing of former Bundesliga player Borna Sosa on loan. The 28-year-old Croatian joins from Premier League side Crystal Palace for one year, as the Bundesliga club announced on Tuesday evening.
The deal was finalized before the transfer deadline. All necessary paperwork was exchanged and the player registered before 20:00. FC Koln's official confirmation followed at 21:15. Sosa had previously passed his medical examination. The club and Crystal Palace had agreed on the loan details early in the day. The left-back's contract with his parent club runs until 2028.
What does the signing mean for the defence?
Borna Sosa brings valuable Bundesliga experience. During his time at VfB Stuttgart from 2018 to 2023, he made 93 appearances in Germany's top flight. He scored three goals and provided 35 assists. This statistic highlights his offensive strengths and his quality in crossing and set-pieces. For the Croatian national team, he has earned 27 caps and scored twice.
He spent the last season and a half in the Premier League. Last season he made 18 appearances for Crystal Palace. Overall, his playing time at English clubs was limited to 19 or fewer appearances per season. His return to the Bundesliga is intended to give him more game time. Thomas Kessler, the 40-year-old head of sport at FC Koln, was pleased with the addition. "We are very happy that Borna is strengthening us this season." Kessler said.
When can Sosa play for Koln?
The new signing could theoretically begin training with his new team as early as Wednesday. His potential debut for FC Koln could come on the next matchday. The Billy Goats travel to face VfB Stuttgart on Friday, September 4, 2026. Kick-off at the Mercedes-Benz Arena is at 20:30. This match is particularly special for Sosa as he would face his former club. Fans can find the complete schedule for the current season on our fixtures page.
The loan of Sosa is the second new signing for FC Koln this transfer week. The club had already announced the signing of Mikey Moore on Monday. The work permit for the young player is still pending. In the left-back position, the squad already includes the experienced 28-year-old Gideon Mensah. The complete team roster can be viewed on the squad overview.
How does Sosa fit into the current plans?
The signing of Borna Sosa gives coach Timo Schultz additional options on the left side of defence. His Bundesliga experience and offensive qualities are expected to help the team immediately. The timing of the signing just before the match against Stuttgart adds an interesting narrative layer. Sosa knows the strengths and weaknesses of many of his former teammates very well.
For FC Koln, the loan is a relatively low-risk transfer. The club takes on the player's salary for one season without paying a high transfer fee. Sosa, in return, gets the chance to prove himself in a familiar environment for future tasks. His contract at Crystal Palace still has two years to run. The coming months will show whether the move brings the desired success for all parties involved. The next opportunity for Borna Sosa to do so is on Friday evening in Stuttgart.
