Manchester United's surprise 1-0 defeat by Burnley on Wednesday was a "bad blow" for the champions, according to manager Alex Ferguson, who put the result down to an off-night in front of goal. United missed a first-half penalty through Michael Carrick along with a host of other chances after falling behind to a great 19th minute volley from Burnley's Robbie Blake. "Maybe the penalty kick at half-time would have made a difference... but for the second half we just needed a bit of composure to finish it off and didn't do it," Ferguson told Sky Sports News. He added: "It is a bad blow to us. I know everyone will say we are never good at the start of the season, we usually take our time and by October we start to get going, but nonetheless we shouldn't be losing these games." It was a night of celebration for Burnley, with the club enjoying a dream first home game on their return to the top flight for the first time since 1976. "You've got to give credit to Burnley," Ferguson added. "It was a great night for them, their fans were absolutely fantastic and the pitch was magnificent. "Everything was there for a really great game of football and it is a special night for Burnley." United, who beat Birmingham City 1-0 in their first match of the season, fell behind at Turf Moor when they failed to clear their lines following a Stephen Jordan cross, setting up Blake to rifle a volley past Ben Foster. "The goal by Blake was a fantastic hit," Ferguson said. "We didn't defend it well, we should have been back goal-side of the lad, but nevertheless it was a great strike. "Burnley got the victory in 10 minutes in the first half. They played very well. "From then on it was complete domination and in these situations we are very experienced and we should be doing better."