The Foxes outclassed their League One opponents - who are managed by Joey Barton - with both Christian Fuchs and Rachid Ghezzal scoring stunning long-range goals. Vicente Iborra and Kelechi Iheanacho also got on the scoresheet.
He said: "I am impressed by the desire we showed to play the same way when we were leading three or four goals, we had fantastic spirit to recover the ball even when we were winning well.
"It's important to win. If we lose this game, that's another consequence - it's very important. We need to continue working and I hope on Saturday we can have our first victory in the Premier League."