Jamaican head coach Winfried Schaefer has likened his side's shock 2-1 Gold Cup semi-final win over the USA to the biblical story of David and Goliath.

Jamaica stunned the host nation by jumping out to a 2-nil half-time lead thanks to goals from Darren Mattocks and Giles Barnes.

The United States managed to get a goal back shortly after halftime through Michael Bradley, but despite a late barrage, the Reggae Boyz managed to hold on for an otherwise unimaginable victory.

"David won against Goliath. One German won against two German coaches," Schaefer said.

"We needed 100 percent or more than 100 percent. I'm very happy.

"I'm very happy, but we're not finished. We have one match more. We cannot make party now. Bob Marley is after the match [on Sunday]."

Jamaica, in their very first Gold Cup final, will now take on nine-time winners Mexico in the decider in Philadelphia on Sunday.