QPR striker Jamie Mackie is expecting a tough test from a rejuvenated Leicester side on Saturday.
Neil Warnock's table-toppers head to the Walkers Stadium to face a Foxes side buoyed by their first win of the season, Tuesday night's surprise 2-1 success over high-flying Cardiff.
"You know when you go there you'll get a tough game and we are under no illusions," said Mackie.
"The manager has told us it will be our hardest game of the season and we are fully aware of that.
"We'll go into it with a good attitude like we always do and if we apply ourselves correctly we'll have a good chance of getting another positive result."