"I feel in good physical form leading up to the tournament. I still need to get in the box a bit more to finish off chances. It means a lot to be involved but going to the World Cup and playing a major part in my main aim," he told ITV.
"We have got a good chance. Anything is possible and we have to go there with the highest expectations."
Rashford scored England's first goal against Costa Rica as the Three Lions concluded their preparations for Russia with a win.