1. FC Köln

Krauss (undisclosed) featured in the second half of Friday's 3-1 victory against Leicester in a pre-season friendly, confirming his return from injury.

Martel (back) started and appeared in a friendly against Leicester City.

Martel is following individual training on Tuesday after suffering back problems on Sunday, the club announced.

El Mala has signed a contract extension until 2030 with FC Koln, the club announced. "We are really pleased that we could show Malek and Said, alongside their family, a very clear perspective and convince them that FC is the right partner going forward to develop both in a sporting and personal sense and to take their first steps in the Bundesliga long-term. Both brothers have a huge amount of potential. Our job is to aid that development in a targeted manner. Said developed into one of the best players in the 3. Liga last season with Viktoria, played a very impressive under-19 European Championship and was able to showcase what he can do. This is a result of our fantastic cooperation with Viktoria Köln, for which we are very thankful. We believe that Said can make the direct step up to the Bundesliga and we will closely follow him on his path to support him as best we can," said Sporting Director, Thomas Kessler.

Sebulonsen has signed a contract until 2028 with FC Koln, joining from Danish side Brondby IF, his new club announced. "We are very pleased to add a second right-back to our squad in Sebastian. He is a strong athlete that fulfils our criteria to be a physically robust, flexible player and gives us more options in our squad. His qualities and potential to develop make him a valuable addition to our team," said Sporting Director, Thomas Kessler.

Krauss is joining FC Koln on loan from Mainz for the 2025/26 season, his new club announced. "We are pleased that we were able to convince Tom to join FC. With him, we get another important addition for our midfield to give our game new options. He brings exactly the qualities that we were looking for in this position. He has a great mentality, is strong in the tackle and is dynamic on the pitch. Despite his young age, Tom already has a lot of experience at the top level and will quickly find his place in the dressing room with how he is as a person," said FC Sporting Director, Thomas Kessler.

Zieler returned to Koln from Hannover, the club announced.

Kaminski has been sent on loan from Wolfsburg to Koln for the entire 2025/26 Bundesliga season, his parent club announced Wednesday.