QPR transfer target Trent Sainsbury is a free agent after terminating his contract with Jiangsu Suning.
Rangers have been hoping to reach an agreement with the Chinese club or that Sainsbury, who was under contract until January, would negotiate his release, paving the way for a move to west London.
However, Dutch club PSV Eindhoven are now showing an interest in the Australia defender.
He is keen to stay in Europe, having ended last season on loan at Swiss club Grasshoppers. He was previously on loan at Inter Milan.
A friend and international team-mate of QPR midfielder Massimo Luongo, Sainsbury, 26, featured in the recent World Cup.
PSV’s interest in him has prompted Steve McClaren draw up a shortlist of possible alternative signings, most of whom have significant Championship experience.
Rangers manager McClaren has been keen to bring in two central defenders this summer following the departures of out-of-contract duo Nedum Onuoha and Jack Robinson.
Toni Leistner was signed from Union Berlin and the R’s have been hoping that Sainsbury would join the German at Loftus Road.
With Darnell Furlong having been sidelined with a knee injury, QPR are also considering bringing in a right-back on loan.
Meanwhile, the club have rejected an approach from Middlesbrough for Luke Freeman and have confirmed goalkeeper Seny Dieng’s loan move to Stevenage.