Cristiano Ronaldo set up Silvestre Varela for a late equaliser on a hot and humid night in the jungle Sunday to give the Portugal a 2-2 draw with the United States and hope for a spot in the second round of the World Cup.Ronaldo, who has been playing despite a left knee injury, sent in a cross in the fifth minute of stoppage time and Varela scored with a diving header in the last seconds of the match.Nani had scored first for Portugal, shooting past a sprawling Tim Howard in the fifth minute, but the Americans responded in the second half as Portugal seemed to wilt in the stifling heat.