Origi’s second goal of the night came from a long ball down the middle from Dejan Lovren, then Trent Alexander-Arnold’s break set up Sadio Mane for the fourth.
“Our two defenders were in a good position but again, Origi scores,” Silva said. “It is impossible, we have to track these players. It does not make sense, we did not plan that way.
“It is really tough for us to be in the relegation zone but if you are there you are making the same mistakes.
“I’m not here to talk about the fight of the players, our opponent was more brave than us. We should do better of course, we were not good enough.”