Manchester United defender Luke Shaw will miss the opening four weeks of the season through injury.

Manchester United’s summer signing Luke Shaw is likely to miss the opening one month of the football action with a hamstring injury. He did not play in last night’s 2-1 pre-season victory over Valencia and United have confirmed the England defender faces a spell on the sidelines.

The manager bemoaned the injuries in his post match comments.

“We have a lot of injuries now,” van Gaal told MUTV “Don’t forget Jonny Evans, Luke Shaw and Antonio Valencia were injured.”

The teenage left-back looks set to miss matches against Swansea, Sunderland, Burnley and QPR and can be out till the middle of September.

The England international has been struggling with fitness since joining the club during the pre-season trip to the United States. Van Gaal revealed at a press conference during the pre-season that he devised a special training programme for the 19 year old full-back, who was out of shape after three weeks off.

Shaw accepted the fitness claims made by the Dutchman then and said, “Obviously I have seen that, and it’s something I totally agree with. To play in this formation you have to be really fit. I am fit but I am not at the high level he demands. I have got to get fitter to get up and down [the wing]. It’s something I have got to work on.”

It seems that the youngster will now have to work doubly hard to get back to football and begin his stint with his new club as soon as possible.

Manchester United confirmed the news via Twitter

United are meanwhile edging closer to signing Marcos Rojo from Sporting Lisbon and this potential signing makes more sense than ever now that Shaw has been sidelined for a considerable time.

United have submitted a £15.9m (20m Euro) offer for Rojo, 24, who played for Argentina in the World Cup final. Reports in Portugal also suggested that Rojo had refused to train on Tuesday to force his transfer through. He has  informed last season’s Portuguese league runners up that he will no longer train with them until the situation is resolved to his satisfaction. Rojo has been employed mostly as a left-back in the recent past but he can play centrally as well.  He possesses considerable pace and brings a lot of attacking threat in the game by regularly moving up front from the left flank. He is young, at 24, and already has a lot of experience at the domestic and international level. He was named in the World Cup Team of the Tournament, and played all 120 minutes of the final. He is suited to be a Van Gaal type of player as the Dutchman would deploy him at wingback in his proposed 3-5-2 system or in the centre of defence.

With Shaw injured, van Gaal will be keen to wrap up the Argentinian’s signature. United will need to bring in a central defender, regardless, before the window closes.