Second-placed Liverpool are level on points with leaders Everton, who have a superior goal difference and play their game in hand at Southampton on Sunday.
Premier League: Jannik Vestergaard bludgeoned home an added-time equaliser for Southampton from a free-kick that Chelsea failed to clear.
Liverpool captain Jordan Henderson had a stoppage-time winner ruled out for offside as Everton twice came from behind to salvage their unbeaten start to the Premier League season on Saturday.
Sadio Mane is the second Liverpool player to test positive for coronavirus after Thiago Alcantara.
Premier League: Goals from Sadio Mane, Andy Robertson and Diogo Jota saw off Arsenal, who had won their opening two league games of the season.
Premier League: Chelsea manager Frank Lampard said the club will need time to bridge the gap on Liverpool after a 2-0 defeat on Sunday.
Victory takes Liverpool level on points with Everton, Arsenal and Crystal Palace at the top of the table.
The Premier League champions Liverpool start their new campaign against Leeds on Saturday.
Sadio Mane helped Liverpool keep alive their bid to set a new Premier League points record as the champions beat Aston Villa 2-0, while struggling West Ham twice blew the lead in a draw at Newcastle.
Liverpool goalkeeping coach Jack Robinson said Alisson Becker is calm under pressure, like World Cup-winning Italian midfielder Andrea Pirlo.
Liverpool were 25 points clear of Manchester City when Premier League was halted due to coronavirus.
Sadio Mane scored the winner with nine minutes left as Liverpool moved 22 points clear of second placed Manchester City.
Roberto Firmino's late winner opened up a 16-point lead for Liverpool at the top of the Premier League with a 2-1 victory at Wolves.
Liverpool have earned 61 points from a possible 63 in 21 games to streak 16 points clear at the top and with a game in hand over second-placed Leicester.
Liverpool haven't lost a game in the league this season and are on top of the points table with 58 points from 20 games, while Tottenham Hotspur are sixth with 30 points from 21 matches.
Liverpool's 19th win in 20 league games this season completed an incredible 12 months for a team at the peak of their powers.
Sadio Mane scored the only goal of a controversial clash at Anfield as Liverpool extended their unbeaten run at home in the league to 50 games.
The Club World Cup triumph completes a fabulous year for Liverpool, with a third piece of silverware to go with the Champions League and UEFA Super Cup.