Sky Sports is reporting that Leroy Fer has failed his medical at Sunderland and will return to QPR.
The 25-year-old Dutch international appeared poised to join the Black Cats on a season-long loan deal but that appears unlikely to go through.
Fer suffered a medial collateral ligament injury last February and returned to action in April and played in the last five games of the season.
Fer also failed a medical when on the brink of moving to Everton from FC Twente back in January 2013.
But he subsequently joined Norwich that summer and made 30 appearances for the Canaries, who also suffered relegation that season.