Maybe the quality of the opposition in pre-season may have impacted on their fitness levels.
"We tired in the last 15 to 20 minutes - which is something I should take responsibility for. We should have had some tougher games in pre-season," he believes.
"I know Liverpool have only had one game in Europe, but it was a tough game. We tired, and I think that probably affected our decision-making.
"For all the hard work, the number of goals scored in the last 15 minutes is huge - and the other 75 minutes goes out of the window.
"It was just one moment - that's all we're talking about - but that's the beauty of the Premier League. I can't complain, because I've been on the other side of it."