FIFA World Cup 2014: Ghana vs US 14th Match in Pictures

A 2-1 win against a Ghana side that knocked the United States out of the last two World Cups will mean nothing if the Americans falter in their remaining Group G games, captain Clint Dempsey said on Monday.

The US were beaten by Ghana in their final group stage game in 2006 and in the last 16 four years later.

"It just so happened we had history with Ghana," said Dempsey, who scored after 29 seconds on Monday but also suffered a broken nose.

"They pretty much knocked us out of the last two World Cups but this win means nothing unless we build on it."

The Americans hope they can carry the momentum into their next match with Portugal in Manaus on Sunday before taking on group favorites Germany in Recife as they bid to make the last 16 for the fourth time in the last seven tournaments.

US forward Clint Dempsey celebrates after scoring during a Group G football match between Ghana and US at the Dunas Arena in Natal during the 2014 FIFA World Cup.

Ghana's midfielder Andre Ayew celebrates after scoring a goal against USA.

US fans cheer before a Group G football match between Ghana and US.

Fan holds a replica of the World Cup trophy.

Ghana's defender Jonathan Mensah (R) heads the ball in front of US defender Fabian Johnson.

Ghana's fans cheer before the start of a Group G football match between Ghana and US.

US soccer fans follow the action from the pier at Hermosa Beach, California.

US forward Clint Dempsey celebrates after scoring a goal against US.

US defender Fabian Johnson (L) vies with Ghana's defender Jonathan Mensah.

US defender John Brooks (C) celebrates with teammates after scoring a goal.

US defender John Brooks celebrates after scoring a goal.

US fans cheer before a Group G football match between Ghana and US.

US forward Clint Dempsey (L) jumps for the ball with Ghana's defender John Boye.

US forward Clint Dempsey (R) celebrates with teammates after scoring.

US German coach Juergen Klinsmann (R) celebrates with teammates.

Ghana's coach Kwesi Appiah reacts during a match between Ghana and US.

US midfielder Jermaine Jones  (L) vies with Ghana's defender Daniel Opare.

US midfielder Kyle Beckerman controls the ball.

(FromL, up) US players US forward Clint Dempsey, US midfielder Jermaine Jones, US midfielder Michael Bradley, US goalkeeper Tim Howard, US defender Geoff Cameron and US defender Matt Besler, (down) US defender Fabian Johnson, US defender DaMarcus Beasley, US midfielder Alejandro Bedoya, US forward Jozy Altidore and US midfielder Kyle Beckerman pose for team photo.

(FromL, up) Ghana's coach Kwesi Appiah, Ghana's goalkeeper Adam Larsen Kwarasey, Ghana's forward Jordan Ayew, Ghana's midfielder Mohammed Rabiu, Ghana's defender Jonathan Mensah, Ghana's midfielder Kwadwo Asamoah and Ghana's defender John Boye, (down) Ghana's midfielder Andre Ayew, Ghana's midfielder Christian Atsu Twasam, Ghana's forward Asamoah Gyan, Ghana's midfielder Sulley Ali Muntari and Ghana's defender Daniel Opare pose for team photo.

(AFP Photo)