Manchester United manager Louis van Gaal refused to solely blame his defence after Swansea City claimed a shock 2-1 win at Old Trafford.
In his first competitive match in charge of United, who could only finish seventh in the Premier League last term, Van Gaal saw his side struggle with his favoured 3-4-1-2 system he had used throughout pre-season.
The home side were sloppy in the first half in the opening game of the top-flight campaign on Saturday and although they improved after the break, as new captain Wayne Rooney cancelled out Ki Sung-yueng's 20-yard effort, Swansea were still able to find a winner.
Gylfi Sigurdsson was the hero for the Welsh side, powering home Wayne Routledge's cut-back with just 18 minutes remaining as United – who also saw Rooney hit the post with an excellent free-kick in the second half – started their campaign with a defeat.
The Dutchman felt his whole team were to blame for the loss and urged the club's supporters to be patient when judging his team.
Van Gaal told BT Sport: "We don't reach our level, what we have showed in the past matches, and that is disappointing because this is the most important match.
"We are disappointing [in] defence and we are disappointing ourselves. And that's why we lost today.
"Of course we need defenders, but that I have already said in former press conferences.
"You cannot say because of one game that we lost, and all the others we won, that it is the defence [that cost them].
"It is the team and how we played today. We never played as a team, I think. That is our error."
Van Gaal felt his side were much improved in the second half and refused to criticise the effort of his players.
"We scored a fantastic goal and then we have chances to make it 2-1," he added.
"But chances is not enough. At the end the result is counting. We have to evaluate why.
"They [players] have done their utmost best…the second half, they have run all the miles together. But I think we have to always keep the heads up."
Van Gaal will demand an improvement from his players when they travel to the Stadium of Light to face Sunderland next Sunday.
|UEFA Europa League Preview: Brondby and Slovan to protect handsome leads|
|Bentaleb pens new long-term deal at Tottenham|
|Barca agree Turan deal|
|FIFA bans Mayne-Nicholls|
|United States v Honduras: Klinsmann demands improvement ahead of Gold Cup opener|
|CONCACAF institutes extensive reforms in wake of FIFA corruption scandal|
|Mauri completes Milan move|
|City sign Turkey striker|
|Women´s World Cup final draws huge US TV ratings|
|My first Chelsea team better than current crop - Drogba|
|Bertrand set for lay-off after knee surgery|
|New five-year Juve deal for Marchisio|
|Allegri extends Juve contract|
|Koeman reiterates Alderweireld interest|
|Valencia bag Bakkali|
|New York City FC complete Pirlo capture|
|Panama v Haiti: Collat ready to challenge the best of CONCACAF|
|UEFA Champions League Preview: Harrison eyes TNS progression|
|FIFA sanctions Yemen for fielding ineligible player|
|Toulouse rubbish Ben Yedder exit reports|
|Mourinho ´knows what he´s doing´ with Falcao signing|
|Watford shell out club-record fee for Capoue|
|Braafheid signs Lazio extension|
|Nani finalises Fenerbahce move|
|Liverpool confirm O´Driscoll appointment|
|Liverpool have to start better - Lucas|
|USA simply too good - Sasaki|
|Portland Timbers 1 San Jose Earthquakes 0: Jewsbury wins it in stoppage time|
|No move yet for Van Persie|
|Lloyd wins Golden Ball, Silver Boot awards|
|Mascherano: I never grabbed Banega|
|Dunga requested Brazil not appeal Neymar´s suspension|
|United States 5 Japan 2: Lloyd stars with hat-trick|
|Fiorentina deny Inter criticism|
|Nani relishing Fenerbahce opportunity|
|Newcastle hold talks over Northampton youngster|
|Cuadrado´s agent plays down Chelsea exit rumours|
|Liverpool´s Alberto set for Deportivo loan|
|Leverkusen suffer surprise defeat, Stuttgart hit six|
|Inter ´dismayed´ at Fiorentina vice-president´s Salah Twitter outburst|
|Blaszczykowski ruled out of Dortmund´s Asia tour|
|Gerrard gets the beers in for LA Galaxy fans|
|De Gea coy over Real links|
|Former Brazil star Carlos handed Delhi reins|
|Ciftci will not push through Celtic switch – agent|
|In-demand Mitrovic considering Roma offer|
|Lehmann calls on Cech to ´get over´ Chelsea|
|Marlos double sinks Monaco|
|Mauritius 0 South Africa 2 (agg 0-5): Bafana set up Angola qualifier|
|Keane relishing Gerrard arrival|
|Palace confirm Cabaye interest|
|Hamburg bring in Spahic after head-butt ban|
|Blatter hits out at France and Germany over World Cup votes|
|Sanchez: World Cup exit spurred Chile to Copa glory|
|Jojic makes Cologne switch, Santana move falls through|
|Carrillo keen to get going at Monaco|
|Micronesia thrashed 38-0 as Fiji triumph in Olympic qualifier|
|Schalke stunned by ´machine´ Caicara|
|MLS Review: Keane shines at Gerrard´s Galaxy unveiling|
|Counter-attacking the key for Japan|
|Jimenez happy at Atletico|
|Gerrard predicts ´successful future´ with Galaxy|
|Iniesta can´t see Real selling Ramos|
|Keshi sacked as Nigeria coach|
|Three finals, three defeats for Messi, Mascherano|
|Nani close to Fenerbahce move|
|Sampaoli revels in ´unbelievable joy´|
|Bravo: Copa victory a dream|
|Martino: Argentina should have won|
|Chile 0 Argentina 0 (4-1 on penalties): Hosts end trophy drought|
|Germany 0 England 1 (after extra time): England make World Cup history|