Manchester United and Manchester City both suffered shock defeats in the Premier League on Saturday as Arsenal went clear at the top after Chelsea had battled back to claim a point at Tottenham Hotspur.
David Moyes suffered his first home defeat as Manchester United manager as West Brom claimed a deserved 2-1 victory at Old Trafford.
After a goalless first half, the match sprung to life in the second with Morgan Amalfitano scoring a superb solo goal. Just three minutes later, United were level through a Wayne Rooney free-kick that somehow evaded everyone, but a tremendous strike from Saido Berahino sealed the points for Steve Clarke's side.
There was late drama as Marouane Fellaini thought he had scored his first goal for the club to equalise, but the Belgian was ruled offside.
The result heaps more pressure on Moyes following last week's humiliation in the Manchester derby.
Manchester City fell back down to earth with a bump following that derby triumph with Aston Villa coming from behind twice to beat them 3-2.
City took the lead their dominance deserved on the stroke of half-time at Villa Park, with Yaya Toure on hand to tuck home from his side's eighth corner of the opening period.
However, Villa grabbed an unlikely equaliser in controversial fashion six minutes after the restart as Leandro Bacuna teed up Karim El Ahmadi to blast the ball past Joe Hart -- but replays showed he was offside.
The visitors weren't behind for long, though, Edin Dzeko bundling in Samir Nasri's corner five minutes later. But Villa levelled for a second time with Bacuna curling in an exquisite free-kick in the 73rd minute before the hosts stunned City by taking the lead two minutes later when Andreas Weimann ran clear to prod past Hart.
Arsenal went back on top of the table after continuing their fine away form with a 2-1 win over Swansea City.
A goalless, and fairly uneventful first half, saw the Gunners come out the better at the start of the second period and young Serge Gnabry latched onto a ball from Aaron Ramsey to slot home his first senior goal for the club.
Arsenal’s lead was doubled shortly after by Ramsey, as the Welshman extended his remarkable run of scoring to eight goals in nine games this season when he picked up the ball on the edge of the box and hammered it into the roof of the net.
Swansea hit back with less than ten minutes remaining as Ben Davies ran onto a chipped ball over the top to slip the ball home, but Arsene Wenger’s men held out to record their eighth straight victory on the road and capitalise on the Manchester clubs’ dropped points.
A second-half header from John Terry ensured Chelsea emerged with a point after a 1-1 draw with Tottenham at White Hart Lane.
Gylffi Sigurdsson had put the hosts ahead in the first half with a composed finish to round off a smart team move. However, a feisty encounter -- in keeping with the pre-match war of words between Andre Villas-Boas and Jose Mourinho -- was levelled midway through the second half when Juan Mata's free-kick was glanced in by Terry.
Chelsea finished the game with ten men as Fernando Torres, who had been having an ongoing tussle with Jan Vertonghen throughout the second half, was shown a second yellow card for the last of a number of clashes between the two men.
Southampton grabbed two quick-fire goals at the start of the second half to see off Crystal Palace 2-0.
Pablo Osvaldo netted his first goal for the Saints since his £15 million move from Roma with a low shot from the edge of the box after 47 minutes, before a Rickie Lambert free-kick went in off the angle of crossbar and post two minutes later for the striker's 200th career league goal.
Two controversial incidents helped Hull to all three points with a 1-0 win at home to West Ham.
Hull were awarded an early penalty when Joey O'Brien was harshly penalised for pushing Robbie Brady in the back -- a decision that left Sam Allardyce fuming -- and Brady confidently converted from the spot to give the Tigers the lead.
The West Ham boss was livid again late in the second half when Jake Livermore blocked a cross with his elbow in the box only for the visitors' penalty appeals to be waved away.
Cardiff heaped more pressure on under-fire Fulham boss Martin Jol after a 2-1 win at Craven Cottage.
Steven Caulker put Cardiff ahead with a thumping header from Kim Bo-Kyung's corner after 12 minutes. In first-half stoppage time Bryan Ruiz, three minutes after coming off the bench, curled a beautiful shot from 25 yards into the top corner, but Jordon Mutch then grabbed a late winner in injury time for the visitors with almost a carbon copy of Ruiz's goal.