The 25-year-old midfielder hit six goals for Queens Park Rangers last season, but with Chris Ramsey's side suffering relegation back to the Championship, Fer is unsurprisingly looking for a move back to the Premier League.
A season-long loan deal with Sunderland had been agreed, but the move fell through earlier today, with the Daily Mail reporting that Fer had failed a medical.
Now, in a bid to put an end to the rumours surrounding Fer's failed move to the Stadium of Light, agent Rob Jansen has told The Chronicle. that the Black Cats pulled out of a deal due to an injury - though Jansen wouldn't disclose what exact injury Fer has.
"Leroy is currently confronted with an injury. That means he is not able to play immediately," said Jansen. "Then Sunderland said: we do not want to go ahead. Leroy is very disappointed. He is now trying to get fit at Queens Park Rangers. Leroy has an injury. What kind? I’m not a doctor, so keep it as ‘injury’," he added.
Fer, who has 11 caps for the Dutch national team to his name, must now try to shake off his injury in order to earn a move away from Loftus Road this summer.
Reports from the Daily Mail earlier this week noted that PSV Eindhoven and West Ham were both monitoring Fer, and his prolonged rehabilitation from an injury could give them time to assess whether they are to make moves for the ex-Norwich midfielder.