Manchester United's new manager Louis van Gaal discovered the extent of the task facing him on Saturday as his side suffered a shock 2-1 defeat at home to Swansea on the opening day of the new Premier League season, dpa reported. Gylfi Sigurdsson's second-half winner was enough to give Swansea victory and leave Van Gaal scratching his head as to why his team failed to perform. United had been hoping for a good start after finishing seventh last season but their defensive frailty was all too clear and they fell behind to an early goal by Ki Sung-Yueng. United were missing a host of top names including Robin van Persie but Wayne Rooney equalized eight minutes into the second half and from there, they would have expected to go on to win. But Sigurdsson took advantage of slack defending to win it for Swansea 18 minutes from time. -- SPA 19:59 LOCAL TIME 16:59 GMT تغريد