Premier League leader Chelsea set a new record of 12 straight home wins as it crushed Wolves 4-0 at Stamford Bridge to stay five points clear at the top of the table.
Florent Malouda smashed in an early opening goal from 25 yards in the fifth minute, seven minutes before his corner was headed in by Michael Essien, with the Ghana midfielder adding a third on 22 minutes.
Petr Cech kept out Sylvan Ebanks-Blake's point-blank header just before the break, but the Blues were always in control, with fit-again England midfielder Joe Cole (56) making it four as he netted his first goal since October last year.
Chelsea sent on Gael Kakuta - the 18-year-old whose controversial move from Lens resulted in a transfer ban for the English club, which is being appealed - for his debut, as Carlo Ancelotti's men tightened their grip on the title race.
Darren Bent's ninth goal of the season for Sunderland brought Arsenal's 13-match unbeaten run to an end in a 1-0 defeat at the Stadium of Light.
The Gunners - without Holland striker Robin van Persie for six weeks because of ankle ligament damage - are the leading scorers in the top flight, but could not break down a determined Sunderland side in the first half.
Hungary keeper Marton Fulop denied Tomas Rosicky's early effort, before Croatia forward Eduardo also went close.
Steed Malbranque twice failed to hit the target when well placed and Andy Reid fired over for the hosts, who eventually went ahead on 71 minutes through Bent after the Gunners failed to clear a corner.
Arsenal is now eight points off the pace, and its defeat allowed champion Manchester United to move back into second spot with a routine 3-0 defeat of Everton at Old Trafford.
A stunning Darren Fletcher volley broke the deadlock on 35 minutes, and Michael Carrick made the points safe with a cool sidefoot finish on 67.
Luis Antonio Valencia rounded things off with a third for Sir Alex Ferguson's side 14 minutes from time.
In the lunchtime kick-off Manchester City was again forced to accept a share of the points as it set a new Premier League record of six successive draws when its clash at Liverpool ended 2-2.
The Reds - who were once more hit by injury as Daniel Agger and Ryan Babel were both forced off inside 20 minutes - took the lead when Martin Skrtel headed home Steven Gerrard's free-kick early in the second half.
However, City was soon in front following a fifth league goal for 25 million pound Togo striker Emmanuel Adebayor (69) and Stephen Ireland's close-range effort (76).
Rafael Benitez's men immediately battled back to level through substitute Yossi Benayoun (78), and both teams had to be satisfied with a point.
Relegation battlers Hull and West Ham drew 3-3 at the KC Stadium, where the hosts ended with 10 men.
The Hammers - with just one league win since the opening day of the season - looked to be on the way to a much-needed three points through headers from Mexico forward Guillermo Franco (five) and Jack Collison (11).
However, the Tigers, themselves in deep trouble at the wrong end of the table, were handed a lifeline as Carlton Cole deflected a free-kick by Jimmy Bullard past Robert Green.
Kamil Zayatte levelled a minute before the break - and there