Liverpool's record signing Virgil van Dijk has admitted that adjusting to his new team's work rate has been challenging.
The £75million man looked an instant hit when he scored a late winner against Everton in the FA Cup on his debut.
However the 26-year-old has revealed it has taken time to adjust to Jurgen Klopp's high tempo football.
Virgil van Dijk is getting to grips with Liverpool's high intensity football in West Ham win
'I am getting used to how we play. The intensity of our game is a lot higher than what I was used to,' he told Football Focus.
'Every day here is tough. We work very hard, run a lot and there is a big difference. I needed to step up my game, especially in the beginning. '
The centre back moved from Southampton in January but was caught in a transfer storm last summer as Liverpool were forced to apologise for their alleged tapping-up of the player.
Van Dijk moved from Southampton for £75million in January