London
Back in England's top division for the first time in 34 years, the Seagulls spent most of the game on the back foot, content to concede possession and setting up a compact defensive unit deep in their own half.
City's Gabriel Jesus had two goals ruled out - for handball and offside - and Pep Guardiola's team struggled to break Brighton down until Aguero fired home a pass from David Silva to open the scoring in the 70th minute.
Five minutes later, Brighton defender Dunk slammed a header into his own net as he tried to clear a cross under pressure from Gabriel Jesus, with the home side lacking the firepower to mount a comeback.
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