Eden Hazard and Marko Marin both marked their debuts with goals as Chelsea strolled to victory over Seattle Sounders on the first leg of their American tour.
Romelu Lukaku opened the scoring for the visitors, after Josh McEachran's inch perfect pass, before Hazard scored his first goal since his summer move from Lille as his goal-bound shot deflected in off John Kennedy Hurtado.
The Sounders fought their way back into the contest through Fredy Montero, who first capitalised on McEachran's lazy wayward pass to net past Hilario before equalising with a left foot shot after 32 minutes.
Chelsea were quickly back in front through Marin, who benefitted from a deflection to notch his first goal for his new club, before Lukaku scored again before the break.
Manager Roberto Di Matteo said he saw enough in the performance of Hazard to believe he can star upon the resumption of the Premier League.
"He [Hazard] can have a great impact in the Premier League next season. He has great qualities and you can see that everyday in training," admitted Di Matteo.
"It is good for Marko and Eden to score in their first game for the club and it was good to see they have a good understanding with their new team-mates.
"I'm pleased with the game and performance - it was everything we were looking for from our first pre-season game, it was a good work out."
While the Blues were kicking off their US tour, London rivals Tottenham got their pre-season underway on home soil with a comfortable win over League One side Stevenage.
After a goalless first half, new signing Gylfi Sigurdsson got Andre Villas-Boas' reign as Tottenham manager off to the perfect start, netting smartly to open the scoring.
Villas-Boas was able to give Tom Huddlestone a run out following his long injury lay off, and new addition Jan Vertonghen 45 minutes of action, before Adam Smith sealed the win late on.
Tottenham face LA Galaxy, Liverpool and New York Red Bulls during the remainder of their American tour.
Manchester United had Federico Macheda to thank for getting their pre-season preparations off to the ideal start, after victory over Amazulu in South Africa.
Dimitar Berbatov, who shone throughout, played in the Italian, whose first half goal was enough to separate the two sides.
Elsewhere, Mladen Petric scored his first goal for Fulham as Martin Jol's side cruised to a 4-0 win over Lokomotive Leipzig.
Marcello Trotta scored twice in the frist half, before Petric and Lauri della Valle continued The Whites' unbeaten start in pre-season.
"Our attack is changing, and Mladen Petric is a new one. He is starting right at the beginning," Jol said.
"It's still the first week and we've only played two games but I would love to be in the top ten this season, like last time when we finished ninth."
Paul Lambert earned his first win as Aston Villa manager with a 1-0 victory over Philadelphia Union, Queens Park Rangers disposed of Sabah XI while Southampton prevailed against Étoile Carouge with Billy Sharp netting a hat trick.