Asamoah Gyan has rated his goal against the United States at the World Cup amongst the best in his career.The Ghana striker’s fine volley flew past Tim Howard in extra-time clinching the 2-1 victory over the Americans on Saturday.“The goal was one of the best of my career. I was pushed from behind and I should have fallen down (to claim a penalty) but I resisted and I made it happen.”Gyan, who is on three goals so far in the tournament, however insists that his primary ambition is to help Ghana advance to the semi-finals as he plays down talk of targeting the tournament’s top scorer award.“I’m only thinking about helping my team to win. The prize is not important, remember football is a collective game.”Source: Ghanafa.org