The Reds were unconvincing in Saturday's 1-0 win over Huddersfield Town.
And van DIjk knows they must raise their game at Anfield.
"They are in the Champions League - the best competition in Europe apart from the Premier League - and it will be a hard game," he said. "We will need to be 100 per cent and I think we will be.
"Against Huddersfield, we should have done even better. Obviously we kept a clean sheet, which is all good, but we could have made it easier for ourselves.
"We need to win every game. There is basically no other mindset.
"It's another Champions League night at Anfield and I'm sure we will recover from Huddersfield and make sure we are ready."