Complex sentence: Under new manager, Jose Mourinho, De Gea made his first appearance of the season in FA Community Shield against Premier League winners, Leicester City, the match ended in a 2--1 victory for the FA Cup winners.
Split into simpler sentences: Under new manager, Jose Mourinho, De Gea made his first appearance of the season in FA Community Shield against Premier League winners, Leicester City. The match ended in a 2--1 victory for the FA Cup winners.