Chelsea suffered a 1-0 defeat to Serie A side AC Milan as Urby Emanuelson got the only goal of their pre-season friendly fixture in Miami.
Chelsea's best chance came early in the game but when Frank Lampard's delivery was headed back across goal by Branislav Ivanovic the loose ball was fired over the bar by John Terry who slipped just as he was about to shoot.
Lampard nearly set up Emanuelson for the opener early in the second half when he gave the ball away to the Dutchman but after beating Terry he shot at Cech.
Emanuelson made no mistake with 13 minutes to go when he forced the ball home following Cech's save from El Shaarawy.
The Chelsea goalkeeper then did well to save at the feet of Mattia Valoti as Milan tried to extend their lead late in the game.