Sunderland won its first Premier League match in 27 attempts on Sunday, beating Middlesbrough 2-0.
Tommy Miller put Sunderland ahead in the second minute and Julio Arca added the other goal with a free kick after an hour.
Sunderland was promoted after two seasons in the Football League Championship. Its previous Premier League win was on Dec. 15, 2002.
Sunderland goalkeeper Kelvin Davis also made four saves in the first half from James Morrison, Aiyegbeni Yakubu and George Boateng twice.
Sunderland had lost five and drawn one of its previous Premier League matches this season. It was the only team not to have won a match this season -- until Sunday.
"I've waited seven games and I'm very, very pleased," Sunderland manager Mick McCarthy said. "Let everybody else wax lyrical, we've worked hard and Boro have caused us a few problems. But I think we deserved it, we've earned the victory and I can't speak highly enough of the players. It gives us belief."
Chelsea leads the Premier League after winning its seventh straight match on Saturday in a 2-1 win over Aston Villa.
Luke Moore ended Chelsea's six-match league streak of clean sheets when he scored in the 44th minute at Stamford Bridge.
"We were concerned because no one wants to go 1-0 down at home, but it was always going to happen," Lampard said. "We were always going to concede at some stage and it was about our reaction, which was spot on."
The win gave Chelsea 21 points. Manchester United lost 2-1 to visiting Blackburn, Arsenal drew 0-0 at promoted West Ham and Liverpool scrambled to a 2-2 draw at Birmingham.
Chelsea is 11 points clear of Arsenal, 10 ahead of United and 14 ahead of Liverpool.
Charlton is second in the standings with 15 points followed by Bolton with 14 and West Ham with 11.
Fernando Baiano and Borja Oubina scored early goals and Celta Vigo downed Sevilla 2-1 to regain first place.
Celta's victory was its fourth in its opening five games as the team continued its impressive form since gaining promotion at the end of last season.
In another fifth-round game, Real Madrid rose to third place with Ronaldo scoring twice in a 3-0 win over promoted Alaves. Jose Maria "Guti" Gutierrez notched the other goal.
In other matches, Osasuna beat Cadiz 2-0, Mallorca crashed 4-1 against visiting Malaga and Athletic Bilbao drew 0-0 with Racing Santander.
Celta has 12 points, one more than Getafe. Madrid has nine, ahead on goal difference of Valencia, Deportivo La Coruna and Osasuna. Defending champion FC Barcelona is next with eight, one more than Zaragoza.
Obafemi Martins' sixth-minute goal earned Inter Milan a hard-fought 1-0 win over Fiorentina, moving Inter into sole possession of second place in Serie A.
Inter is three points behind league-leader Juventus, which extended its perfect record with a 2-1 win at Parma on Saturday.
After scoring off a cross from Luis Figo, Nigerian striker Martins performed a double flip to celebrate.
Eight Zimbabwean players failed to board planes home after a game in Britain and may be trying to settle in the country illegally, newspaper reports said Sunday.
The Observer newspaper said the eight, some of them big names at home, had vanished after the match in Bradford, northern England, between two Zimbabwean teams, Caps United and Highlanders Football Club.
Two disappeared after checking in at London's Heathrow Airport for Zimbabwe-bound flights, the paper said.