Reece James's superb second-half strike crowned an impressive 3-1 win for Chelsea against Brighton & Hove Albion at Amex Stadium.
Jorginho fired the Blues ahead with a 23rd-minute penalty after debutant Timo Werner had been fouled by goalkeeper Mat Ryan.
After Neal Maupay had spurned a good chance to level from Tariq Lamptey's inch-perfect cross, the Seagulls did equalise on 54 minutes with a fine left-foot finish from Leandro Trossard.
But their joy was short-lived as James restored Chelsea's advantage only two minutes later with a thumping 20-yard shot into the top corner for his first Premier League goal.
Lewis Dunk squandered a glorious opportunity to level when, unmarked at the back post, he failed to get a decent connection on Trossard's inviting cross.
And Chelsea made the points safe on 66 minutes when James delivered a corner that Kurt Zouma turned in with the help of a deflection.
See: Brighton report | Chelsea report
Next fixtures
Brighton: 20 Sep v Newcastle (A)
Chelsea: 20 Sep v Liverpool (H)
Referee: Craig Pawson. Assistants: Ian Hussin, Richard West. Fourth official: Simon Hooper. VAR: Kevin Friend. Assistant VAR: Simon Beck.
