Chelsea manager Jose Mourinho has questioned his side's lack of 'serial champions' following their disastrous start to the season.
The defending Premier League champions have started their campaign with three defeats, two draws and two wins and sit 14th in the standings.
And ahead of their Champions League Group G clash against Porto on Tuesday, Mourinho hit out at his side's lack of winning mentality.
"There are two sorts of champions. There are those who win something, and there are lots of them," he said in his pre-match press conference. "But there are the other champions who, during their career, win one, two, three, four, five, 10 or 20 titles.
"In this club we have 25 champions from last year, but serial champions in this squad? John Terry, Jon [Obi] Mikel and [Branislav] Ivanovic are serial champions. Almost every season they have something in the pocket. But how many other serial champions do we have?
"Last year we were champions, but the point for me is are we serial champions? Of course it's very difficult to win every season, but you can be a serial champion in your approach and your attitude.
"Mentally I can say I am a serial champion. I can be five or 10 years without winning a title, but I will still be a serial champion in my approach and my attitude. This is the problem we have at this moment. We have champions, but not serial champions."