Werder keeping tabs on Pasanen
The Bundesliga outfit are scouring the market for a replacement for Mladen Krstajic, who is set to join Schalke next summer, and Pasanen has caught the eye both domestically and in Europe.
Pasanen has established himself as a first team regular under Ronald Koeman, having arrived at the club in 2000 from Finnish side Lahti.
The defender has a further 18 months to run on his contract, but talks over a new deal have not yet resulted in an agreement.
Werder are said to be monitoring the player's situation and could step in with an offer next summer.
Koeman is clearly a fan of Pasanen, but could be tempted into a sale if no new contract is agreed.