Manchester City fell to a fourth consecutive 1-0 defeat at the Stadium of Light as Sunderland secured their second win of the season.
Phil Bardsley was Sunderland's matchwinner with his first Premier League goal of the season in the 21st minute.
The defender perfectly placed a shot past Costel Pantilimon in the Manchester City goal, but Sunderland had to hang on to claim the victory.
Sergio Aguero saw a first-half header fly wide of goal, while substitute Jesus Navas had a chance blocked by Bardsley on the line.
City pushed hard for an equaliser, penning the hosts inside their own half, but Micah Richards and Eden Dzeko were both denied by Vito Mannone.
The three points lift Sunderland to within two points of Stoke City in 18th position, while Manuel Pellegrini’s side lose further ground on the leaders.
Pellegrini made five changes from the UEFA Champions League win over CSKA Moscow, with three of the alterations coming in his back four.
Wes Brown started his first Premier League game in 22 months for Sunderland, while Steven Fletcher and Sebastian Larsson both returned.
Despite an equal share of possession it was the hosts who had better of the early chances, but in the 18th minute they were lucky to see Larsson stay on the pitch after a mistimed challenge on Javi Garcia.
The tackle did not bring a card, but the Spaniard was withdrawn at half-time.
Three minutes later Poyet's side broke the deadlock through Bardsley.
The defender shrugged off the attentions of James Milner and Demichelis, who got in each other’s way on City’s right, and placed a composed finish into the far corner.
Just after the half hour City had their first sight of goal through Sergio Aguero, but the Argentina international wasted a fantastic chance.
After being released by Samir Nasri on the left, Aleksandar Kolarov delivered a cross to the back post for the 25-year-old, yet he was unable to get his back-post header on target.
The visitors were denied an equaliser five minutes into the second half as Bardsley blocked a shot from Navas, who replaced Garcia, on the goalline.
Aguero rolled away from John O'Shea on the left and raced into the penalty area before rolling the ball back to Navas, but his shot was blocked by the chest of the defender.
City's dominance intensified in the closing stages but Richards saw a low shot from the edge of the penalty area stopped by Mannone, and substitute Dzeko's first effort was parried away by the Italian prior to a frantic finale that saw Sunderland hold on.
|Coach: G. Poyet|
for E. Giaccherini 72'
for S. Fletcher 77'
for A. Johnson 87'
|Eisfeld makes Fulham move|
|Zarate opens account as West Ham stumble|
|I have nothing to prove, says Ince|
|Barcelona seal Mathieu deal|
|United prepared to spend big, claims Woodward|
|Shakhtar to play in Lviv|
|Pereyra poised for Juve switch|
|Fabregas eyes trophies at Chelsea|
|Vorm confirms Tottenham transfer|
|Deila: Forster will leave Celtic eventually|
|No pressure for Shaw|
|Van Gaal happy with preparations|
|Diarra aiming for Bordeaux return after West Ham frustration|
|Last season for Montpellier owner Nicollin|
|Monaco: Rodriguez deal too good to ignore|
|Nacional Asuncion 2 Defensor Sporting 0: Hosts surge towards Libertadores final|
|Garcia eyeing Serie A title|
|Father against Vlasic´s move abroad|
|Rodgers welcomes Gerrard´s international retirement|
|Cruzeiro, Atletico Mineiro bid for Robinho|
|Inzaghi not drawn into Balotelli speculation|
|Dunga ´not going to sell a dream´|
|City´s Fofana allegedly racially abused|
|Carroll ruled out of NZ friendlies|
|Rodgers excited by new arrivals|
|Zeljeznicar 2 Metalurg Skopje 2 (agg 2-2): Visitors advance on away goals|
|Gibson returns as Tranmere hold Everton|
|UEFA Champions League Review: Celtic coast through, BATE given scare|
|Gomez and Jones feature in Sunderland win|
|Leicester hit Ilkeston for six|
|Austin fires QPR to narrow victory|
|Guardiola: No trophies and I may be sacked|
|Dortmund held as Immobile makes debut|
|Rodriguez´s dream becomes Real|
|Garcia: Benatia and Ljajic going nowhere|
|Stoke secure Bojan on four-year deal|
|FA: No World Cup bids for England|
|Kroos commits to Bremen|
|Caulker makes QPR move|
|Forest agree Hunt loan deal with Palace|
|Bartra ready to prove himself at Barca|
|Southampton looking to sell Osvaldo|
|Marveaux loaned to Guingamp|
|Mourinho eyes success on two fronts|
|Sammer encouraged by Lewandowski start|
|PSG punished for abuse of Chelsea fans|
|Dunga unveiled as Brazil coach|
|Shakhtar CEO: Focus is on players´ safety|
|Foster agrees new West Brom deal|
|Real Madrid sign Rodriguez|
|Mustafi eyes Bundesliga switch|
|Klopp laughs off Hummels, Reus speculation|
|Campana makes Sampdoria switch|
|Leicester seal Ulloa deal|
|Morata sidelined for seven weeks with knee injury|
|Riviere on target in comfortable Newcastle win|
|Advocaat set for Serbia role|
|Wisdom joins West Brom on loan|
|Bundesliga to consider vanishing foam|
|Five-man shortlist for Ivory Coast|
|´Personal issues´ keep Gervinho away from Roma tour|
|Jedinak raring to go|
|Borini set for Liverpool stay, claims agent|
|Koeman: No bids for Lovren|
|Livermore: England hopes shouldn´t hinge on club side|
|MLS Preview: Tough tests for Conference leaders, Revolution still struggling|
|Mathieu not Barca material, says Marquez|
|West Brom claim unimpressive win in Sacramento|
|Neymar: Brazil behind Germany, Spain|
|Vietnamese police confirm match-fixing players|
|Lucescu blames Joorabchian for AWOL players|
|Robinho undecided on future|
|Rush: Still years left in Gerrard|
|Tiago re-signs with Atletico|
|Puyol against Spain overhaul|
|Agger considering his Liverpool future|
|Peruvian Primera Division Review: Juan Aurich bounce back, Melgar draw with Inti Gas|
|Bayern deny interest in Cuadrado|
|New signings on show in Hull double-header|
|Hooiveld strike sinks Swindon|
|Costa departs Valencia|
|Morata suffers knee injury in training|
|K.League Preview: Seoul, Sangju aim to close gap to sixth, Ulsan host Jeonbuk|
|Lewandowski off the mark on Bayern bow|
|Gerrard retirement will boost Liverpool - Carragher|
|World Cup bidding report due in September|
|Evra bids emotional farewell to United fans|
|J.League Preview: Ventforet Kofu look to escape drop zone, Sagan Tosu battle Kawasaki Frontale|
|Salah spared military service|
|Garcia would welcome Torres return|
|Livermore understands Ince decision|
|Cole happy to get away from English press|
|Evra seals Juve switch|
|Bayern stay was Kroos´ ´priority´|
|Scuffet: Udinese right place to continue developing|
|Gerrard retires from England duty|
|Ambitious Pochettino targets title|
|Aspas eager to put ´bad season´ behind him|
|Atletico Mineiro v Lanus: Visitors out to recover from first-leg loss|
|UEFA Europa League Preview: Sligo, Inter Baku out to finish shocks|
|Hughes expects Bojan decision soon|
|Cech on the mend - Holland|
|Pardew eager to honour crash victims|
|Prandelli hits back at critics|
|Negredo breaks metatarsal|
|Rooney eager to impress Van Gaal|
|Palacios´ Qatar move falls through|
|Wenger rules out striker signing|
|Six Shakhtar players refuse to return|
|Six Vietnamese footballers arrested for match fixing|
|Copa Libertadores Preview: Nacional Asuncion, San Lorenzo to host first legs|
|Mata hopeful of title|
|Napoli bullish about Scudetto chances|
|Colombian Primera A Review: Patriotas Boyaca, Deportes Tolima start with wins|
|Subotic thrilled to be back|
|Germain: Monaco can replace Rodriguez|
|Sullivan confident of Carroll improvement|
|Callejon staying put|
|DC United 3 Chivas USA 1: DC end Chivas´ winning run|
|Liga MX Review: Goalkeeping howler costs champions Leon, Monterrey move top|
|Chilean Primera Division Review: Huachipato, Santiago Wanderers opening-day winners|
|Brazilian Serie A Review: Internacional rout Flamengo, Cruzeiro win again|
|Prosinecki keen on South Korea job|