Fenerbahce have made an offer for Huddersfield defender Zanka a source close to the Super Lig outfit revealed to Turkish-Football.
The Yellow Canaries have made Huddersfield an offer but are keeping their options open.
Fenerbahce are keen on Zanka but talks have yet to reach an advanced stage as no agreement on his price yet.
Zanka has just 12 months left on his contract but Huddersfield are not willing to let their defender leave for below their valuation.
The Istanbul based outfit do have more financial freedom after selling Eljif Elmas to Napoli for €16m but still have to keep within the budget defined by their arrangement with FFP.
The Yellow Canaries are currently in talks with at least two other defensive targets and plan to sign up to two centre-backs before the end of the transfer window.
Fenerbahce have made signing a defensive player a priority over the summer.
The Yellow-Navy Blues struggled at the back last season and could end up losing Martin Skrtel if they do not decide to sign a new contract deal.