Manchester United F.C . won the FA Community Shield and defeated Swansea City by 4-1 early in the 2013-14 season under new management .
He had actually been announced as the club 's new manager before the end of the previous season , but did not officially take over until 1 July 2013.Despite winning the FA Community Shield in his first game and guiding United to a 4–1 win at Swansea City in the opening Premier League fixture , United were soon struggling in the league and endured some of their worst results since the end of the 1980s .