London: Manchester United defender Luke Shaw has suffered a hamstring injury and will miss the opening game of the season against Swansea City on Saturday, the club announced on Wednesday.

The England international, a pre-season signing from Southampton, is likely to be sidelined for around four weeks after the 19-year-old became the world’s most expensive teenage footballer when he joined United for £27 million (Dh166.14 million) in June.

Shaw missed the 2-1 friendly victory against Valencia at Old Trafford on Tuesday due to the problem and now faces a frustrating wait before making his competitive debut for the club.

Earlier on Wednesday, United confirmed that the left back had been given the number three shirt for the coming season following Patrice Evra’s departure for Juventus.