Wataru Endo admits he's still trying to adjust to demands at Liverpool.
The Japan midfielder was a late summer arrival from VfB Stuttgart.
The 30-year-old has started just one Premier League game for the Reds and has largely been consigned to Europa League and Carabao Cup duty.
Endo told Sky Sports: Everything's different: physical, technique, speed.
It's the Premier League. Of course, I don't play a lot of games in the Premier League but when I played against Newcastle, it was a very tough game for me. It's a lot of speed, everything is different."