There's no fear there imo, with Liverpool. They don't really have a player who I would look at before meeting them and think 'we need to keep him quiet'. Every other top team I'd say have at least 1/2 that would make me think we'd need to shut them down. I don't think anybody fears Mane or Origi or Lallana.
I rate him, he's a good player especially for a side set up for pace (Henderson less so) and is a good finisher, but I wouldn't fear him, he plays on Valencia's side predominantly anyhow, Antonio would match him for pace all day long. Salah may cause Blind a few more problems