Chelsea moved to the top of the Premiership with a narrow 2-0 win over local rivals Fulham at Craven Cottage.
Frank Lampard was the Blues' matchwinner, first converting a 73rd-minute penalty before drilling home a low shot 10 minutes from time.
Liverpool showed signs of clicking into gear with a second home win in a week, beating Tottenham 3-0 at Anfield in Saturday's early kick-off.
After surviving a huge scare through Jermaine Jenas' close-range miss, second-half strikes from Mark Gonzalez, Dirk Kuyt and John Arne Riise moved the Merseysiders onto 10 points.
Arsenal built on last weekend's win at Old Trafford by taking another three points, this time against Sheffield United at the Emirates Stadium.
William Gallas' first goal for the Gunners, a Phil Jagielka own-goal and Thierry Henry's first strike of the season were enough to give Arsene Wenger's side the spoils.
Aston Villa remain one of only three Premiership teams unbeaten after their 2-0 win over Charlton at Villa Park.
Young strikers Gabriel Agbonlahor and Luke Moore both struck for Martin O'Neill's side, who move onto 12 points as a result.
Manchester City relieved some of the pressure on manager Stuart Pearce with their second win of the campaign at the expense of struggling West Ham. Greek striker Georgios Samaras scored both goals in a 2-0 win.
Middlesbrough slipped to another home defeat, this time to a single goal from Blackburn's Shabani Nonda. The on-loan Roma striker nodded the winner just before the half-hour.
Wigan and Watford shared the spoils at the JJB Stadium, with Henri Camara's opener cancelled out by Hamuer Bouazza's leveller for the Hornets.
Barclays Premiership results - 23/9
Arsenal 3 Sheffield United 0
Aston Villa 2 Charlton Athletic 0
Fulham 0 Chelsea 2
Liverpool 3 Tottenham 0
Manchester City 2 West Ham 0
Middlesbrough 0 Blackburn 1
Reading 1 United 1
Wigan 1 Watford 1
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