"For me it is clear and Xabi slipped. It was unbelievable and I don't understand these things. That was the turning point of the game because when we equalised I thought we could win," said the Liverpool boss.
"We didn't play that well in the first half, but we controlled the second half. But with 10 men it is more difficult. We made a mistake for the winning goal, but Steven knows that and he has scored 18 goals for us this season.
"My concern now is to recouperate the players and look for three points against Fulham."