Chelsea boss Jose Mourinho has urged the USA to go all out and beat the Black Stars to stand a chance of progressing from Group G.
The Yanks are bent on laying Ghanaâ€™s bogey to rest in Natal after defeats in the last two World Cup finals.
Head coach Jurgen Klinsmann has spoken of his sideâ€™s renewed determination to beat the Black Stars for the first time.
But Mourinho has told the Americans they will require more effort to edge the 2010 World Cup quarter-finalists.
â€œThe Black Stars are beatable but the U.S must work extra hard. They are a strong African team with a good record in the world cup but I think if the U.S will have a chance they must beat them,â€ Mourinho, who is an analyst for Yahoo, said.
â€œIf they are able to take three against Ghana then they will have less pressure taking on Portugal.
â€œSo the dynamics are simple they have to beat Ghana.â€