Jurgen Klopp insists that Liverpool's trip to title rivals Manchester City on Sunday is the 'most difficult game in the world of football'.
The two title favourites will lock horns for the first time this season at the Etihad Stadium and it is not lost on Klopp just how difficult it will be against Pep Guardiola's side.
Reigning champions of Liverpool have started far stronger this season, heading to Manchester top of the table while City are slumped in 10th with three wins from their opening six games.
But even with City's increased fragility this season, Klopp is braced for the toughest assignment to his knowledge in world football.