Tadic left Southampton for Ajax in 2018 and put in a masterclass to destroy Los Blancos in their last-16 second leg.
The Ajax ace would be a fantastic addition for Liverpool.
The 30-year-old, who left the Saints for Ajax last summer, feels things at the Premier League club have been on a downward trajectory.
Premier League strugglers Southampton sold Dusan Tadic to Eredivisie challengers Ajax for £9m and he shone agaisnt Real Madrid in the Champions League.
Dusan Tadic has been in extraordinary form in the Eredivisie with Ajax - why did Premier League strugglers Southampton ever let him go?
Dusan Tadic was sold after four years at Southampton, moving back to the Eredivisie with Ajax.
Dusan Tadic has helped Ajax closer to the Champions League group stages.
Southampton have reportedly identified Hamburg's Bundesliga star Filip Kostic as the man to succeed Ajax's Dusan Tadic at St Mary's.
Dusan Tadic has spoken for the first time about leaving Southampton for Ajax, claiming the decision to do so caused him no problems whatsoever.
Southampton are set to lose Dusan Tadic despite retaining their Premier League status, with a move to Eredivisie club Ajax reportedly close.
West Ham have been made favourites to sign Southampton's Dusan Tadic.
Arsenal are reportedly preparing a bid for Southampton's Dusan Tadic; but is he really the type of player they should be targeting?
What would a combined XI consisting of the current Southampton side and the one that Gordon Strachan guided to eighth in 2003 look like?