Get the day's biggest United stories delivered straight to your inbox Subscribe Thank you for subscribing We have more newsletters Show me See our privacy notice Invalid Email

Manchester United defender Marcos Rojo has returned to Argentina to continue his rehabilitation from a dislocated shoulder.

Rojo dislocated his left shoulder in training last month and has not played for United since the goalless draw with PSV Eindhoven on November 25.

The left-back was stood in the away end for United's defeat at Stoke in December and the January win over Liverpool at Anfield, however the Argentine Football Association confirmed Rojo flew out to Buenos Aires for more treatment.

The AFA posted on Twitter: "Marcos Rojo spent yesterday in the grounds of the AFA to continue rehabilitating."

The 25-year-old dislocated the same shoulder in United's derby defeat at City last season, yet he returned within a month.

Rojo's slow recovery this time could force United to sign a full-back in the January transfer window.

Louis van Gaal expressed a desire to sign a left-back in November and last week reiterated his determination to bring in a full-back.

Ashley Young, who has played at left-back and right-back this season, is out for a 'long time' after undergoing groin surgery and Matteo Darmian was substituted in the weekend defeat to Southampton after suffering a head injury.

Cameron Borthwick-Jackson is expected to continue at left-back against Derby in Friday's FA Cup tie, with Daley Blind, who has played the majority of the season at centre-back, the only other senior alternative.

Watch Samuel Luckhurst on Van Gaal's future

Video Loading Video Unavailable Click to play Tap to play The video will start in 8 Cancel Play now

Long-term absentee Luke Shaw is not expected to be available until March, at the earliest.