Fernandez has spent the last four years at the Liberty Stadium, with 127 appearances being made in all competitions, but the centre-back's future is currently uncertain due to Swansea's relegation from the Premier League.
FC Krasnodar have been linked with an approach for the Argentina international, who admits that a switch to the Russian side is a possibility before the end of the window.
The 29-year-old is quoted by Wales Online as saying: "Krasnodar are one of the teams interested. I need to analyse that and other options have come in as well.
"[Krasnodar] are very interested in me and we will have to see what happens with the window. Of course I have a contract with Swansea and that's why I'm here and working hard but if they want me to come, then of course I want to play at the highest level."
Fernandez currently has two years remaining on his contract.