Raheem Sterling scored his first Chelsea goal since joining from Manchester City as the Blues beat Udinese 3-1 in Italy.
Former Everton and Watford winger Gerard Deulofeu pulled one back for Udinese before Mason Mount wrapped up Chelsea's win late on.
Elsewhere, Dwight McNeil shone on his debut as Everton beat Dynamo Kyiv.
McNeil, who joined the Toffees from Burnley for £20m earlier this week, struck twice after coming off the bench to seal a 3-0 win for Frank Lampard's side at Goodison Park.
Having been introduced just after the hour mark, McNeil rifled home on 73 minutes before bagging his second five minutes later after being set up by fellow debutant Ruben Vinagre.