The video will start in 8 Cancel

Don't wait 30 years - sign up for our daily football email newsletter today! Sign up Thank you for subscribing See our privacy notice Invalid Email

The Argentina left-back, 20, is at the centre of a transfer storm with Liverpool, Arsenal and Southampton all interested.

The Saints tabled a £13m bid last week as they eye up a replacement for Luke Shaw.

But that was turned down and now United have leapt into action.

Reports in Portugal claim the Red Devils have offered £9.5m, with the remaining £6.5m to be paid in instalments.

But Sporting aren't keen and they want the cash up front as they only own 25 per cent of the player's rights.

Starsport understands that Rojo has been given the backing of the investment group that owns the other 75 per cent to push for a move to a big league this summer.

United have already spent £30m on England left-back Shaw but, since then, Patrice Evra has quit for Juventus.

Boss Louis van Gaal is keen to play with wing-backs and sees Rojo, who can also play at centre-half, as a good option to compete with Shaw.

The Argentine last week fuelled speculation he was set for a move to Old Trafford after following Manchester United, Wayne Rooney, Robin van Persie and Adnan Januzaj on Instagram.