Frank Lampard says Chelsea have unfinished business against Barcelona ahead of the Champions League semi-final meeting between the two sides.
The Blues confirmed their passage to the semi-final with a nervy 2-1 win over Benfica at Stamford Bridge, booking a meeting with Pep Guardiola's reigning champions.
Previous meetings between them provide the ideal backdrop to an intriguing last-four encounter, with the last meeting at the same stage in 2009 shrouded in controversy following Andres Iniesta's late goal.
"Everyone's got unfinished business with them," the 33-year-old told Sky Sports.
"You have to respect they're the greatest team in the world; they have been and still are at the present time. That game is still in our minds, but this is a completely different year so we need to try and beat them."
"Obviously they're going to be favourites because of the way they're playing.
"We have a lot of belief in ourselves here, we know we'll have to perform at out absolute best to get a result against them and we believe we can do that."
The semi-final three years ago saw the Catalans go through on away goals, with the hosts having numerous penalty appeals turned down by referee Tom Ovrebo.
Guardiola's side went on to win the competition in Rome against then holders Manchester United, who had edged Chelsea in the final 12 months previous to that on penalties.
The pair couldn't be more even in their head-to-head meetings in the Champions League, worth both having won twice and drawn twice in their eight matches, however Roberto Di Matteo's side are without a win at the Nou Camp.