Liverpool manager Jurgen Klopp is wary of the quality of Manuel Pellegrini's West Ham.

The two teams kickoff their season today.

"One of the very, very successful managers on this planet. He knows how football goes, so he's a really good tactician and coach. That changes a lot of things," said Klopp of his counterpart.

"If you go through the West Ham team, it could be completely different. It could be Arnautovic in the '9', Yarmolenko and Felipe Anderson wide or Chicharito striker with Arnautovic behind in the '10'.

"Behind them, Wilshere and Noble or whoever, then a new full-back, Cresswell back. It's just a good football team.

"They are ambitious, clearly. People expect that we win, and we expect the same, but we know that between now and then there are 95 brutal minutes, and we have to be ready for that.

"It's easy not to underestimate West Ham. Analysis is pretty non-existent at this stage, but no problem. I'm still looking forward to it."