While Liverpool seems to get an extreme amount of luck, they do create their own luck by being excellent and play with such tempo it forces mistakes out of their opposition. So it's a bit unfair to say that it's lucky when Fabianski just let's that ball roll through his legs. However, it is getting very annoying that they aren't ever even slightly unlucky. Even the very best teams, like Barcelona at their peak, had games where they were excellent and still didn't win.