Brighton and Hove Albion 3 Chelsea 4
Ten-man Albion lost narrowly in their first match of the Premier League Summer Series in Philadelphia.
Albion want ahead through Danny Welbeck on 13 minutes after Billy Gilmour found Kaoru Mitoma.
The winger headed the ball into the path of Welbeck who smashed it home.
Chelsea equalised through Chris Nkunku on 20 minutes.
But the game changed early in the second half when young Albion defender Jan Paul Van Hecke clattered into Cesare Casadei and was shown a red card.
In the space of 11 minutes, Chelsea racked up what proved to be an unassailable 4-1 lead.
They started with 22-year-old Ukrainian winger Misha Mudryk who put Chelsea in front with a stunning strike.
And his goal was followed by efforts from England midfielder Conor Gallagher and the Senegalese forward Nicolas Jackson.
Albion introduced new signing Joao Pedro who won and dispatched a penalty after being chopped down by the much sought after Levi Colwill.
Pedro and fellow substitute Julio Enciso were involved in the build up for Albion’s third goal, expertly finished by Deniz Undav.
Albion made several substitutions and – as well as the impressive Pedro – also gave debuts to Simon Adingra, goalkeeper Bart Verbruggen, Jenson Weir and young defender Imari Samuels.
Jack Hinshelwood and new signing Mo Dahoud both started and Adam Lallana made his comeback from long-term injury
Albion next take on Brentford in Atlanta on Wednesday (26 July).