Sibierski told the Evening Chronicle: “I can understand how the fans feel and, as players, we take full responsibility for what has happened.
“We didn’t do well in the second half and we have to accept responsibility for what happened.
“We can’t go on believing that every game is going to be easy.
“We have to know that we didn’t do well and keep working hard.
“We have to please our great supporters and win the next game against Manchester City.”