Cristiano Ronaldo is unconcerned by his goal drought and says scoring is like getting ketchup out of a bottle.

Portugal star hoping for flow of goals this summer

Cristiano Ronaldo is not concerned by his goal drought and has described scoring to getting tomato ketchup out of a bottle. The 25-year-old Portugal star will lead his side out in their first World Cup game against the Ivory Coast but he did not score once in the qualifying campaign. He will need to be firing on all cylinders if Portugal are going to get out of the so-called 'Group of Death', as Brazil also lie in wait for Carlos Queiroz's men. Ronaldo is confident he can perform in South Africa, and explained goals are like "ketchup - when it comes out (of the bottle) it all comes out at once. "But I am not worried - I am just plugging away as usual. God knows who is working hard and who is deserving. I am perfectly calm. "I want to turn in a great tournament and, who knows, be the best. I will strive for that. My ambition has always been to be the best." The Real Madrid star also revealed that it has taken him a while to get used to the new World Cup ball. He added: "I'm more used to it than I was two weeks ago. I don't think it will be a problem. "We've trained enough with it to get accustomed to it and I'm sure the dribbles, the shots and the corners with it will all be fine." And Ronaldo also admitted he has a concern about the noise created by the vuvuzelas in the crowd. "It is difficult for anyone on the pitch to concentrate," he remarked. "A lot of players don't like them, but they are going to have to get used to them. "Teams have done nothing but criticise the vuvuzelas, but you have to respect them. "Hardly anyone likes them, but the people who do like them are those who like to blow the instruments and make a racket."