Salomon Kalou insists Chelsea should fear themselves more than Benfica when they meet in the second leg of their Champions League quarter-final.
The rivals clash at Stamford Bridge on Wednesday with the Blues in the driving seat after leaving the Estadio da Luz with a 1-0 victory last week. A semi-final against Barcelona or Inter Milan awaits on April 18 should they dispose of Benfica, but Kalou is wary of complacency.
"I think our worst enemy can be ourselves, thinking that we have done the most difficult part," he said.
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