Harry Kane is ready to be called upon when needed by Roy Hodgson as England prepare to face Iceland on Monday.
The Tottenham striker started England's first two games in the tournament - being substituted at half-time against Wales - before coming off the bench in the final Group B game against Slovakia.
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But he has no problem with Hodgson's use of his squad as England look towards their last-16 tie.
"I think it's part of the tournament, we have a great squad of players and use everyone in it in the right way," he said. "I think not many teams will play the starting XI throughout the whole tournament.
"As players we need to be ready when called upon and I think we are. Anyone who steps in or out is focused on the team. If it changes then we are ready for that and go out there for the win."
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Kane played a full part as Tottenham challenged Leicester for the Premier League title and reached the Round of 16 in the Europa League, but insisted he had plenty left in the tank for England.
"I'm not tired, I've had it before last year when it was the Under-21s to the Euros, people said the same thing," he said.
"I'm 100 per cent fresh. I feel sharp, I feel ready and if called upon I will be out there giving 110 per cent.
"We want to progress, now is a better time than ever. We have to make sure we are focused and ready to go, hopefully maybe with a bit of luck and a bit of fortune we will win the game comfortably."
The 22-year-old also believes that England can take their chances against Iceland on Monday evening and progress further in the competition
"We've not scored as many goals as we should have. We've had a lot of chances that we probably should have done better with. It's part of the game, not every game we're not going to find the back of the net three or four times.
"We've been patient, I think we have been the better team against every team we've played and now we are in knockout stages, it is about putting them goals in, scoring as many as we can and keeping them clean sheets as well.
"We have done what needed to do, we have got through the group stage and now we can look forward to the game ahead. We want to beat Iceland and progress to the quarter-finals and see who we get from there. We fancy ourselves against anyone and we're confident in our ability."