Foden moved onto 16 league goals for the season with a first-half brace at the Amex Stadium, seeing a free-kick deflect past a wrongfooted Jason Steele before stroking home after some reckless play from the Seagulls.

De Bruyne had earlier given City the lead with what was his 68th Premier League goal but the first with his head, as Pep Guardiola's men made light of Erling Haaland's injury-enforced absence.

Julian Alvarez added a fourth as City pulled two points clear of Liverpool and within one of Arsenal with a game in hand, knowing five further wins will guarantee they retain their crown.  

Brighton, meanwhile, stay in the bottom half with 44 points, having been surpassed by Bournemouth on Wednesday.

Nathan Ake could not keep his shot down when presented with the first half-chance after a low-key start, but City went ahead with a brilliant goal after 17 minutes.

Foden slipped Kyle Walker in on the right flank, and De Bruyne watched the full-back's cross all the way before sending a wonderful diving header into the top-right corner.

There was more fortune about City's second, which arrived just nine minutes later as Foden's free-kick deflected in off Pascal Gross amid Brighton complaints about how Foden won the set-piece.

Brighton only had themselves to blame when Foden got his second after 34 minutes, though. Valentin Barco conceded possession cheaply on the edge of his area, and Foden swept the loose ball into the bottom-left corner.

Ederson denied Joao Pedro as Brighton improved in the second half, but City had further daylight just after the hour mark, Walker breaking in behind and beating Steele to a loose ball, with Alvarez on hand to turn home.

Brighton were enraged when Josko Gvardiol avoided conceding a penalty for a clumsy challenge on Pedro, who skewed wide late on as City – who went close to a fifth through Jeremy Doku late on and face struggling Nottingham Forest next – claimed a statement win.