He said: "I'd expect by this time next week we'd be much fitter and that's important.
"It was so important for us to stay in the competition. We've scored two goals and we'll be better for it next week.
"I felt for a little period in the second half we started to look tired, but then we started to force it again and we had a couple of decent opportunities and got the goal to go back in front.
"It was just disappointing that we conceded so late in the game.
"But it's all set up now for Villa Park next week."