West Ham United kicked off Week 9 of the 2014/15 Barclays Premier League season with a shock 2-1 win over reigning champions Manchester City.
The Hammers created a massive dent in City's title defence thanks to goals from Morgan Amalfitano and Diafra Sakho at Upton Park prior to David Silva's late response for the visitors.
French midfielder Amalfitano opened the scoring in the 21st minute before Senegalese striker Sakho, who joined from Metz in the summer, made it six goals in as many matches with 15 minutes remaining.
Silva pulled one back for City two minutes later but were unable to create an equaliser as Sam Allardyce's men cemented their spot in the top four with a third straight win as Manuel Pellegrini's side remained five points behind league leaders Chelsea who take on Manchester United on Sunday.
Arsenal returned to the winners list with a 2-0 result at Sunderland courtesy of a brace from Alexis Sanchez.
The Chilean netted on the half-hour mark and in injury-time to guide the Gunners to a third triumph of the campaign which has them placed fifth on the table, two points out of the top four.
West Bromwich Albion produced a second-half comeback to deny Crystal Palace maximum points at The Hawthorns after falling behind by two goals at the break.
Brede Hangeland's second goal for the Eagles and captain Mile Jedinak's stoppage time penalty had Neil Warnock's side in pole position before the Baggies hit back through Victor Anichebe prior to Saido Berahino's injury-time conversion from the spot which yielded his seventh goal of the term.
Second-placed Southampton moved to within three points of Chelsea with a narrow 1-0 win over Stoke City at St Mary's which came courtesy of Sadio Mane's second of the season while Hull City held Liverpool to a 0-0 draw at Anfield to move into the top half of the table.
In the late game, Swansea City moved up to sixth after a 2-0 home win over Leicester City with Wilfried Bony scoring both goals for the victorious Swans.
Sunday's fixtures see United host the Blues at Old Trafford while Everton travel to Burnley and Tottenham take on Newcastle United at White Hart Lane.
Monday night's clash pits bottom-placed QPR against Aston Villa at Loftus Road.
2014/15 Barclays Premier League - season scores
West Ham United: 2 (Morgan Amalfitano 21', Diafra Sakho 75') Manchester City: 1 (David Silva 77') Upton Park, London - 34,977
Liverpool: 0 Hull City: 0 Anfield, Liverpool - 44,591
Southampton: 1 (Sadio Mane 33') Stoke City: 0 St Mary's Stadium, Southampton - 30,017
Sunderland: 0 Arsenal: 2 (Alexis Sanchez 30'/90+2') Stadium of Light, Sunderland - 44,449
West Bromwich Albion: 2 (Victor Anichebe 51', Saido Berahino (p) 90+3') Crystal Palace: 2 (Brede Hangeland 16', Mile Jedinak (p) 45+1') The Hawthorns, West Bromwich - 24,738
Swansea City: 2 (Wilfried Bony 34'/57') Leicester City: 0 Liberty Stadium, Swansea - 20,259
