"I can't believe we have lost this game. After playing well in the first half we started the second half with four clear chances. We hit the bar and Kuyt and Alonso had great chances that we didn't take," said the Reds boss.
"Always it's important to create chances but you have to score from them. We were going forward, controlling the game and were dominant.
"I am really disappointed but it was really bad luck because everybody could see we were better than them.
"We were talking on the bench saying we have to score the second goal to finish the match off. I made some changes and thought the pace of Babel could make a difference, but to concede the two goals is something that is difficult to explain.
"As a team we were really good but we need to take our chances. That makes the difference in a game like this.
"Everybody was really disappointed in the dressing room because we know we had the game in our hands, but sometimes in football you need luck. It was a game we easily could have won 4-0."