LONDON, Feb 3: Chelsea maintained the pressure on Premier League leaders Manchester United on Saturday when another Frank Lampard special gave the champions a 1-0 win at strugglers Charlton Athletic.

In the early kickoff, Liverpool's hopes of mounting a late title challenge suffered a knock when they were held 0-0 at home by Everton in the Merseyside derby.

Chelsea are on 57 points, three behind Manchester United, who play at Tottenham Hotspur on Sunday, and seven ahead of third-placed Liverpool.

At the other end, new signing John Carew scored his first goal to help Aston Villa beat relegation-threatened West Ham United 1-0 while Bolton Wanderers won 1-0 at bottom side Watford.

Wigan Athletic, who had lost a club record eight league games in a row, opened up a five point gap on the relegation places thanks to a 1-0 victory over UEFA Cup hopefuls Portsmouth.

Blackburn Rovers beat Sheffield United 2-1, Reading won 2-0 at Manchester City and Fulham edged out Newcastle United 2-1.

Arsenal, who in fourth place, visit Middlesbrough in Saturday's late game.

Chelsea, missing the injured Ashley Cole and with captain John Terry only fit enough for the bench, had little trouble shrugging off second bottom Charlton.

Lampard struck his 10th league goal of the season and eighth in eight games on 18 minutes when he fired in a trademark 25-metre shot.

He almost doubled his tally on the stroke of halftime when keeper Scott Carson saved his drilled free kick, while substitute Salomon Kalou hit the post shortly after coming on.

Liverpool and Everton both had chances during a typically high-tempo start to the derby before home striker Craig Bellamy had a goal ruled out for offside after 10 minutes.

Everton, who beat their rivals 3-0 at home in September, came closest in the second half when Andy Johnson's effort was saved by Pepe Reina after a mix-up in the home defence.

The visitors, who remain in eighth, then defended stoutly to deny a frustrated Liverpool their sixth successive league win.

Liverpool manager Rafael Benitez, who employed three strikers, labelled rivals Everton as ‘small’ and bemoaned their defensive mind-set.

“We are really disappointed. You could see one team that wanted to win and one didn't want to lose,” he told Sky Sports.

Argentina midfielder Javier Mascherano, who has been given special FIFA dispensation to move to Liverpool from West Ham United, was in the stands but is awaiting a green light from the Premier League to join his new club.

“With confidence, we are waiting,” Benitez said.

Results:

Aston Villa 1 West Ham United 0

Blackburn Rovers 2 Sheffield United 1

Charlton Athletic 0 Chelsea 1

Fulham 2 Newcastle United 1

Liverpool 0 Everton 0

Manchester City 0 Reading 2

Watford 0 Bolton Wanderers 1

Wigan Athletic 1 Portsmouth 0

—Reuters