A controversial second-half penalty was the difference as Manchester United's Europa League campaign started with a 1-0 loss to Real Sociedad at Old Trafford
Following the death of Queen Elizabeth II earlier in the evening, both sets of players wore black armbands and a minute's silence was impeccably observed by all those inside the ground ahead of kick-off
UEFA and the Football Association decided it was too late to postpone the fixture, but understandably there was a subdued atmosphere inside Old Trafford which reflected the mood of the nation
 Announcements were low-key, no music was played and advertising boards were black with branding toned down
The game's only goal was scored on 59 minutes in controversial circumstances
 Lisandro Martinez, introduced as a half-time substitute, was deemed to have handled the ball in the box as he blocked a close-range David Silva shot, despite the former Manchester City midfielder's effort deflecting off the Argentine's thigh first
Italian referee Marco Di Bello immediately awarded a penalty and after being checked by VAR, his decision stood
 Brais Mendez stepped up to give Sociedad the lead, his powerful and precise spot-kick too good for David de Gea
Cristiano Ronaldo, who was back in the United starting line-up for the first time since August 13, earlier thought he had put his side ahead, but his powerful header from a Diogo Dalot cross in the 36th minute was correctly ruled out for offside
The 37-year-old saw two more efforts miss the target after the break before Sociedad went in front
 Casemiro - making his full United debut - then had a shot from distance well saved by Alex Remiro as the hosts went in search of a late equaliser
It didn't arrive though and Erik ten Hag, who made six changes to his team following Sunday's victory over Arsenal, loses his opening European fixture as United manager
United are third in Group E after matchday one, with Sheriff Tiraspol beating Omonia Nicosia 3-0 in Cyprus in the evening's other game
It is the first time Sociedad have won against English opposition in European competition, while United had not lost any of their previous 18 home matches in the Europa League before Thursday's defeat
However, the result prompted a muted response from both players and staff on the sidelines at the final whistle in light of the sad news from Buckingham Palace
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