The Reds went two goals down before a brace by Steven Gerrard earned them a draw.
“I thought we played well and we were much better than the last two games at home, but we should have taken all three points,” the Spain defender told Liverpoolfc.tv.
“We conceded two bad goals but we then showed character and got it back to 2-2 thanks to Stevie.
“We then had some clear chances towards the end of the first half but we couldn’t get the third goal.
“I think we tried everything to win the game. We had three or four clear chances in the second half and Sami hit the post but couldn’t score.
“We played really well in the wide areas and I think overall we were unlucky.”