Chelsea go up against Southampton tomorrow at Stamford Bridge (5:30pm) having picked up just eight points from a possible 21 this term.
The Premier League champions will also still be digesting the 2-1 Champions League defeat to Porto in midweek.
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Jose Mourinho says Chelsea's poor start is a learning experience
And Mourinho is now looking to end his side’s disappointing start to the campaign with a win over the Saints, a side Chelsea failed to beat last season.
The Blues manager did admit, though, that he is learning from the experience.
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Jose Mourinho looking to end poor form tomorrow against Ronald Koeman's Southampton
He said: “I define it as the worst period in my career with the worst results in my career, which I see as a fantastic experience.
“Not one I want to repeat. I want it to finish tomorrow, but it's a good experience in my career.
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“It comes too late. To come after 15 years is too late. It should come after three or four. But it's something that's helping me to be better.
“It's a great negative experience. I've had big challenges all the time. But it's the worst period: I've never lost so many matches, that's a fact.”