Workmanlike Arsenal dig in to cloud new Manchester United dawn

The return of familiar defensive frailty undid Manchester United. 

Arsenal's Riccardo Calafiori scores the only goal in the English Premier League clash with Manchester United at Old Trafford. Pic: AP Photo/Dave Thompson)

Premier League: Manchester United 0 Arsenal 1

MANCHESTER United's brave new dawn was undone by familiar failings as Riccardo Calafiori proved to be an unlikely Old Trafford match-winner.