According to German Sky Sports reporter Florian Plettenberg, Frankfurt has provided Koch with a top contract renewal, with the contract term to 2030.

Florian Plettenberg said that Koch has neither made a final commitment to Frankfurt nor has he explicitly rejected Leverkusen, and the contract between the two parties has not been signed. Frankfurt is highly optimistic about Koch's contract renewal, and Koch's decision is expected to be released soon, with the signing plan scheduled for next week.

The 28-year-old German defender Koch has made 43 appearances in various competitions this season, scoring 3 goals and contributing 2 assists. His contract with Frankfurt expired the summer afterwards, and now the price of Germany is 18 million euros.