Jack Grealish opened the scoring in the first minute of the game before Haaland doubled the advantage soon after with his 11th Premier League goal of the season in just his seventh appearance in the competition.
Phil Foden’s second-half finish from Kevin De Bruyne’s assist – his second of the game – made it an easy afternoon’s work for Pep Guardiola’s team who remain unbeaten, the three points having also moved them ominously to the top of the Premier League table.