A brace from Christian Benteke and a debut goal from Antonio Luna helped Aston Villa to a shock 3-1 win over Arsenal on Saturday.
Benteke followed in his own saved penalty to head home after Gabriel Agbonlahor was clumsily brought down in the box by Wojciech Szczesny, cancelling out Olivier Giroud's sixth-minute opener in the process.
Laurent Koscielny then also fouled Agbonlahor to gift the visitors another spot-kick, which Benteke converted first time.
And Luna then wrapped things up with a cool finish on the break deep into the second half.
The result represents a dream start for a Villa side who spent long periods of last season battling against relegation, while Arsenal's chances received an early blow.
Much had been made of Arsene Wenger's reluctance to sign new stars following a close-season clearout at the Emirates Stadium, and the threadbare nature of the Arsenal squad was perhaps underlined by the presence of youngsters Emmanuel Frimpong, Serge Gnabry and Carl Jenkinson on the bench.
Santi Cazorla started the game alongside them due to his lack of fitness, though Jack Wilshere earned a starting berth for the hosts.
In the opposite dugout, Paul Lambert handed a start to just one of his close-season signings - Spanish full-back Luna - in a team similar to that which had narrowly escaped relegation last term.
And the visiting supporters' concerns regarding another battle against the drop were hardly eased when Giroud opened the scoring with just six minutes on the clock.
Alex Oxlade-Chamberlain had little trouble in escaping the attentions of Matthew Lowton down the left-hand side before cutting into the box to provide the Frenchman with a tap-in he could not miss.
Villa's day then went from bad to worse just 10 minutes later, when Nathan Baker was forced off with an injury and had to be replaced by Ciaran Clark.
The visitors could have collapsed after receiving those early blows, but Lambert's men evidenced their resolve - and they had their rewards not long after courtesy of an incredible Agbonlanhor run.
The Englishman slalomed beyond a static Arsenal defence after picking the ball up in a deep position and tempted Szczesny into bringing him down in the box. The Pole was perhaps fortunate to only see yellow but he received no such luck when his fine save from Benteke's penalty looped up perfectly for the Villa striker to nod the ball home.
Szczesny then elected to go on an unwise foray out of his box a few moments later which resulted in a hashed clearance and saw him only avoid conceding by virtue of a full-stretch save.
But Arsenal held firm against the resulting corner and a string of Villa counter-attacks to go in at the break level, a scoreline that did not please the frustrated home support.
With Kieran Gibbs having already been forced off with a cut above the eye, Wenger was forced to again turn to his bench at half-time to introduce Cazorla in place of the injured Oxlade-Chamberlain. The Spaniard's involvement did little to change the flow of the game, though, with Villa continuing to threaten and even hitting the inside of the post via a long-distance Fabian Delph strike.
They had the opportunity to take a deserved lead on the hour mark, as Koscielny's challenge on a breaking Agbonlahor in the box was, perhaps unjustly, adjudged to have been a foul. Benteke again stepped up to take the spot-kick, and he did not need a rebound this time as he sent Szczesny the wrong way to put Villa 2-1 up.
Wenger's woes were then compounded when Koscielny unwisely lunged into a challenge with Andreas Weimann to receive a second yellow card.
But there was still time for yet more disappointment, as a fantastic throughball from Weimann allowed Luna to burst beyond the Arsenal defence and pass the ball home beyond Szczesny.
|6||L. Koscielny||61' 67'|
|Coach: A. Wenger|
for K. Gibbs 28'
for A. Oxlade-Chamberlain 46'
for B. Sagna 90+4'
|FIFA Club World Cup: Bayern Munich 2 Raja Casablanca 0|
|Scottish Premiership Wrap: Celtic extend lead as Inverness slip up|
|Bundesliga Wrap: Dortmund, Leverkusen both beaten|
|League One Wrap: Brentford take advantage as top two stutter|
|League Two Wrap: Boothroyd sacked as Northampton lose, Oxford held|
|Downing delights in late leveller|
|Hughes happy with Adam impact|
|Meulensteen: Fulham need to turn performances into points|
|Lambert upbeat despite defeat|
|Bruce vents frustration|
|Hughton backs referee over Brown decision|
|Poyet worried that time is running out for Sunderland|
|Allardyce bemoans defensive errors against United|
|Pulis hopes Palace learn lessons|
|Pellegrini praises Navas and Milner impact|
|Pardew praises ´dream-like´ Newcastle victory|
|Championship Wrap: Leicester defeat QPR, Burnley go top|
|We must rebuild, says Klopp|
|Moyes defends Januzaj dive|
|Premier League Preview: Arsenal v Chelsea|
|Premier League: West Brom 1 Hull City 1|
|Premier League: Sunderland 0 Norwich City 0|
|Premier League: Crystal Palace 0 Newcastle United 3|
|Premier League: Stoke City 2 Aston Villa 1|
|Premier League: Manchester United 3 West Ham 1|
|Premier League: Fulham 2 Manchester City 4|
|Bundesliga: Borussia Dortmund 1 Hertha Berlin 2|
|Martino happy at Barcelona|
|Ancelotti restates desire to keep Alonso|
|Rodgers lauds Suarez|
|Mackay: I´m going nowhere|
|Premier League: Liverpool 3 Cardiff City 1|
|Walker expects ´difficult´ Southampton test|
|Acerbi suffers cancer relapse|
|A-League: Melbourne Heart 1 Melbourne Victory 3|
|De Boer dismisses Spurs link|
|Mourinho: It´s not me against Wenger|
|Pellegrini targets trophies|
|Conte would welcome Italy opportunity|
|Lahm calls for Bayern focus|
|Bale: I am under less pressure at Real|
|Ranieri laments missed opportunities|
|Moyes confirms Fellaini back scan plan|
|Bayern Munich will respect Raja Casablanca, says Guardiola|
|Yeboah signs for Monchengladbach|
|Proud Benitez demands focus|
|Serie A Preview: Atalanta v Juventus|
|Primeira Liga Wrap: Porto, Benfica victorious|
|Football League Wrap: Tranmere defeated, Chesterfield move top of League Two|
|Serie A Preview: Inter v Milan|
|Bundesliga: Frankfurt 1 Augsburg 1|
|Ligue 1: Monaco 1 Valenciennes 2|
|La Liga: Elche 0 Malaga 1|
|Eredivisie: RKC Waalwijk 1 Twente 1|
|La Liga Preview: Getafe v Barcelona|
|Ligue 1 Preview: Paris Saint-Germain v Lille|
|UAE Pro League Wrap: Al Ahli extend lead, Al Shaab earn rare win|
|Lambert seeks more Villa away success|
|Sunderland will have ´no excuses´ for Norwich failure, says Poyet|
|Hughton hails Poyet impact|
|Pardew anticipating difficult Palace clash|
|UEFA provisionally ban three clubs from European competition|
|La Liga Preview: Valencia v Real Madrid|
|Valdes to keep new club quiet|
|Allardyce urges West Ham to expose United frailties|
|Bruce bemoans Brady injury|
|Laudrup rules out Tottenham switch|
|Premier League Preview: Swansea City v Everton|
|Benitez is ´a lucky charm´, says De Laurentiis|
|Stoke wait on Shawcross fitness|
|Koscielny to miss out on Chelsea clash|
|Liverpool owner hails Suarez deal as sign of club´s progress|
|Moyes reveals Nani setback|
|Schweinsteiger to return in January|
|Thohir not worried ahead of derby|
|Mourinho eyes defensive improvements|
|Pellegrini optimistic on Zabaleta return|
|Gourcuff reveals contract refusal|
|Suarez pens new long-term Liverpool deal|
|Klopp predicts tough Hertha battle|
|Dempsey has medical ahead of Fulham return|
|Bruce sympathetic to Mackay situation|
|A-League: Brisbane Roar 0 Newcastle Jets 2|
|Celtic´s Lustig set to miss four months|
|Messi blasts Barca official|
|Redknapp slams Villas-Boas´ signings|
|Atalanta out to continue home record|
|Phillips poised for January Palace exit|
|Dembele: Spurs ´positive´ about Sherwood appointment|
|Benitez predicts busy January at Napoli|
|Kerslake expects Mackay to be in charge for Liverpool game|
|Lowe given Glory role|
|Baines set for Everton return|
|Pedro keen on emulating Iniesta|
|Pochettino not interested in January purchases|
|Poyet calls for mid-season break|
|Iajour up for Bayern test|
|Martinez seeking ´short-term solutions´ in transfer window|
|Kompany urges City to remain focused|
|Rodgers glad he avoided Tottenham|
|Del Piero in line to take on Juventus in Australia|
|Copa del Rey Wrap: Valencia scrape through, Bilbao thrash Celta|
|Primeira Liga: Maritimo 2 Braga 2|
|Galliani to stay at Milan|
|Klopp plays down Club World Cup|
|Schalke coach Keller not fearing the sack|
|Wilshere loses appeal against two-match ban|
|Zaha on Pardew´s radar|
|Milan will be my final club, says Abbiati|
|Anigo to remain at Marseille helm for time being|
|Premier League Preview: West Brom v Hull City|
|No Bankia involvement in Bale deal, says Perez|
|Galliani wants stronger Milan youth system|
|Rafinha extends Bayern contract|
|Premier League Preview: Stoke City v Aston Villa|
|Poyet: No excuse not to perform|
|Vanishing spray to be used at World Cup|
|Gabbidon praises Palace strike pair|
|Premier League Preview: Manchester United v West Ham|
|Hughton calls for Norwich City to show character|
|Premier League Preview: Fulham v Manchester City|
|Samaras attracting Lazio interest|
|Premier League Preview: Liverpool v Cardiff City|
|Rodgers backs Mackay at Cardiff|
|Foster back fit and raring for West Brom recall|
|De Boer agent denies Tottenham contact|
|Premier League Preview: Crystal Palace v Newcastle United|
|Hungary appoint Pinter as new coach|
|Iniesta signs new Barca contract|
|Rodgers coy over Suarez talks|
|Jagielka hopes for fresh faces at Everton to help top-four push|
|A-League: Central Coast 1 Wellington 0|
|Spain end top of FIFA rankings for sixth year running|
|Allardyce disappointed to draw Manchester City|
|Pascoe hails ´unbelievable´ Suarez|
|Vorm knee surgery brought forward|
|Blanc hails Cavani brace|
|Michu wants Aspas to join Swansea City|
|Hoeness plays down Bayern treble suggestions|
|Dzeko confident he can fill Aguero void|
|Moyes: No loan offers for Zaha|
|Kiessling calls for Leverkusen response|
|Matuidi: Cavani on par with Ibrahimovic|
|Yeboah set to join Borussia Monchengladbach|
|Rooney a ´chance´ to face West Ham|
|FIFA Club World Cup Preview: Bayern Munich v Raja Casablanca|
|Benzarti praises ´extremely talented´ Raja Casablanca|
|Ranieri unsure over Falcao return|
|Coupe de La Ligue Wrap: Cavani leads PSG to dramatic win|
|Copa del Rey Wrap: Real Madrid through as Sevilla crash out|