Under the tutelage of Pep Guardiola, in his first season as a top-flight manager, Barcelona's treble-winners of 2008/09 are remembered as an unstoppable, tiki-taka juggernaut - but Chelsea gave them a real run for their money in the Champions League semi-final.
As for Chelsea, they suffered a 1-0 defeat at West Ham on Saturday.
The victory moved Chelsea level on points with Manchester United in second, but there is still a sizeable gap between them and leaders City. "It's frustrating", said Chelsea captain Gary Cahill.
'It's hard, 14 points, ' says Willian before Hazard interrupts.More news: Animal Crossing Pocket Camp adds gardening next month
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Huddersfield claimed a stoppage-time consolation when Laurent Depoitre glanced a header into the net from fellow substitute Florent Hadergjonaj's left-wing cross.
And Huddersfield went 3-0 behind five minutes after the restart when Willian managed to knock Marcos Alonso's cross back to Pedro, who crashed it into the top corner.
Manchester City, Manchester United, Liverpool, Tottenham Hotspur and Chelsea all progressed from the group stage, making England the first country to have so many sides through to the knockout phase.
Mathias Jorgensen also lifted the home faithful with a long-range effort, but home pressure was not to last as Hazard brilliantly set up Pedro twice in as many minutes, only for the Spaniard to pull both efforts wide.