dividends as Antonio Valencia, Kagawa and Hernandez looked sharp and fluid, with Rooney excelling again and Ryan Giggs bringing all his experience and guile to the fore.
Opposition: Not surprisingly, Sociedad were stunned by the early strike and took a while to get a foothold in the game; 30 minutes had elapsed before they even threatened United's goal as Haris Seferovic stung David De Gea's palms, though Antonio Griezmann rattled the woodwork with a superb free-kick just before the break. Still without a point after three games in the group, it's a long way back for Jagoba Arrasate's men.
Move of the match: Soon after the goal and still inside the first 10 minutes, Giggs' super pass released Kagawa down the left and the Japanese schemer's inviting first-time cross narrowly evaded Hernandez, who appeared to be impeded as he stretched for the ball.
In the stands: It was all about the singing section in the south-east corner of the ground, and the trial was a roaring success, literally, as United's band of vocal fans sang their hearts out for almost the entire 90 minutes. They more than matched the 6,000 away supporters, who nevertheless contributed to a great atmosphere.