London:William Gallas scored an injury-time equaliser for Arsenal to draw 2-2 with Manchester United and stay unbeaten in the Premier League.
Gallas' shot crossed the line before it was pushed out by Manchester United goalkeeper Edwin van der Sar, with the linesman awarding the goal on Saturday.
"The referee interrupted the game and I thought he had given a free kick against us for offside, so I had a surprise because the ball was in," Arsenal manager Arsene Wenger said.
Cristiano Ronaldo scored in the 83rd minute to give Man United a 2-1 lead. Gallas had scored an own-goal in first-half injury time before Arsenal leveled through Cesc Fabregas in the 48th.
Arsenal stays top on goals scored with 27 points - the same as United -- but the Gunners have played one game less.
"I think we had to stay top of the table, we have to put pressure on other teams," Gallas said. "We have to stay at the top to put pressure on Manchester United and maybe they can make the mistake."
Tottenham drew 1-1 with Middlesbrough in the first league match in charge for Spurs manager Juande Ramos, Chelsea beat Wigan 2-0 and Liverpool struggled up front in a 0-0 draw at Blackburn.
Also, it was: Aston Villa 2, Derby 0; Everton 3, Birmingham 1; Fulham 3, Reading 1; and Newcastle 1, Portsmouth 4.
On Sunday, West Ham hosts Bolton. Tomorrow, Sunderland travels to Manchester City.
With City idle, Chelsea moved into third with 24 points, followed by Portsmouth and Blackburn and City with 22 and Liverpool with 21.
Manchester United led 1-0 when striker Wayne Rooney received a cross from Wes Brown and his shot from close range was deflected in off Gallas' right arm.
Gallas had his team's best chance in the first half, a header which was saved by the legs of Van der Sar in the 36th.
Fabregas scored his 11th goal in 16 games to make it 1-1.
Emmanuel Adebayor had a shot saved by Van der Sar and Bacary Sagna crossed the loose ball for Fabregas to side-foot inside the corner.
Fabregas' 58th-minute free kick was saved by Van der Sar, while Rooney headed wide in the 64th.
Frank Lampard put Chelsea ahead in the 11th minute and Juliano Belletti made it 2-0 in the 18th, capping off a solo run with a goal.
Chelsea's seventh win in a row brought its goal tally to 12 goals in its last three games and manager Avram Grant wasn't interested in the Arsenal game.
"What is important is what we do," Grant said. "Our eyes are only on our team.
Ramos didn't get much time to enjoy his first win at Spurs on Wednesday, a 2-0 victory over lower-league Blackpool in the League Cup.
Darren Bent gave Spurs the lead against Middlesbrough in the 35th minute with a low drive into the bottom corner.
Defender Luke Young leveled in the 52nd minute with a long-range goal into the top corner.
Ramos had some previous experience against Middlesbrough -- his Sevilla side beat Boro 4-0 in the 2006 UEFA Cup final.
Spurs has eight points from 12 games, with Middlesbrough one point ahead.
Tottenham assistant manager Gus Poyet said Ramos needed more time.
Liverpool manager Rafa Benitez deployed an unusual forward line -- Dirk Kuyt as sole striker and Steven Gerrard playing behind him.
Gerrard moved back to right midfield when Peter Crouch was introduced in the 72nd minute.
Kuyt had three chances in the second half, Gerrard had two and Crouch had a header cleared off the line. Blackburn had chances through David Bentley and David Dunn.
Portsmouth was three goals up at Newcastle inside 11 minutes. Noe Pamarot scored in the eighth with a long-range shot, with Benjani Mwaruwari adding his eighth Premier League goal of the season a minute later. John Utaka made it 3-0 in the 11th.
Portsmouth defender Sol Campbell scored an own-goal in the 16th minute. Portsmouth goalkeeper David James blocked a shot from Newcastle midfielder Charles N'Zogbia and a follow up strike from Michael Owen went in off Campbell.
Niko Kranjcar finished off Portsmouth's rout in the 71st to help the club to its first win at Newcastle in 58 years.
"Disappointed is an understatement," Newcastle manager Sam Allardyce said. "I am devastated by what has happened here today. I am completely gutted inside."
Everton scored two goals in injury time to complete a 3-1 win over Birmingham. Ayegbeni Yakubu had put Everton ahead in the 10th, and Olivier Kapo leveled for Birmingham in the 80th.
Carsley scored with a long-range shot and then headed to James Vaughan who scored Everton's third.
Fulham won only its second league match of the season with goals from Simon Davies, Clint Dempsey and David Healy.
Kevin Doyle scored Reading's goal with a header in the 54th.
Martin Laursen and Ashley Young scored in Villa's win, which kept Derby bottom of the Premier League with six points.