Manchester United manager Louis van Gaal said he and his team deserved to be booed by fans after the 1-0 loss to Southampton at Old Trafford.
United failed to score a first-half goal for the 11th home game in a row, before Charlie Austin got the winner in the 87th minute.
United are fifth in the Premier League, five points behind fourth-placed Tottenham and 10 off leaders Leicester.
“They are right to boo. I cannot deny that, I saw the match,” said Van Gaal.
“For better or for worse we have to stick together,” added the Dutchman after his side’s six league defeat of the season.
United have taken 37 points from their first 23 games, their lowest total in the Premier League era and three points fewer than under David Moyes during the 2013/14 season.
Van Gaal added: “We are working very hard, but we have had a lot of injuries. That you cannot change.”