Chelsea will defend a slim lead in Barcelona on Tuesday three years on from keeping a clean sheet in the Champions League semi-final at the Camp Nou.
Didier Drogba's first leg strike and - just as crucially - the Blues' success in shutting out the Catalans gives them hope as they bid for their second European Cup final.
On four occasions and under three managers Chelsea have fallen at the last four hurdle however. Monaco in 2004 came to define Claudio Ranieri's season under Roman Abramovich whereas Liverpool were the bete noire of Jose Mourinho on two occasions in 2005 and 2007.
And most recently, Guus Hiddink was unable to lead the club to Rome to face Manchester United after Andres Iniesta's 92nd minute away goal in 2009.
Norwegian referee Tom Henning Ovrebo too was accused of thwarting Chelsea that mad May night, after the home side had four penalty appeals waved away.
Last Wednesday's clash was the 14th encounter between the Blues and the Blaugrana, and as our gallery will attest, scuffles between the pair go as far back as 1966...
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