"It was a case of getting used to them and that was why I was getting a bit of cramp in my foot. I am fine."
Beckham believes there is more to come from England as they stand just three games from writing themselves into football history.
He said: "I am not going to sit here and tell you we are going to win the World Cup, but I will say that the expectations of this team are very high.
"We are trying to keep to those expectations every time and I think we are doing that now.
"We are not getting carried away. When we got through the group stage the celebrations were not over the top, and when we beat Denmark we were happy and shook each other's hands - then looked to the next game.
"We were not celebrating because we wanted to start getting ready for the quarter-final right away.
"We are only in the quarter-finals, but hopefully we have got three very tough games to come. We are happy to be in the last eight, but we want to go further.
"People said the odds were against us because we were in the 'Group of Death' and then people said we wouldn't have a chance if we got through because we would face France, who were the world champions.
"They are not here any more and there have been a lot of shocks, and there may well be more before the World Cup is over."