Chelsea's interim coach Guus Hiddink insists they are determined to prevent Manchester United from completing an unprecedented quintuple.
United, who face Inter Milan in the return leg of their last-16 tie at Old Trafford on Wednesday, are looking to add the FA Cup, Champions League and Barclays Premier to the Carling and FIFA Club World trophies they have already bagged this season.
Hiddink said: "We'd like to give some obstructions to their aims. That's rather normal. If we threw the towel in, there'd be no competition. They're aiming at five, and that's a hell of a lot."
In 1988, Hiddink led PSV Eindhoven to a European Cup triumph as well as lifting the Dutch league and cup crowns.
Chelsea may yet have the chance to stop United's march to a famous five on two fronts.
The Blues could meet Sir Alex Ferguson's side in the final of the FA Cup and their paths may ultimately cross in the Champions League.
But Hiddink insists Chelsea will be ready for the moment if and when it arrives.
"They'd like to have the quintuple," said Hiddink. "It is very rare but they are on all roads, and that has to be respected how well they're doing it.
The Dutch coach, in charge of the side until the summer, believes there is enough talent within the Chelsea squad to win the Champions League but he is experienced enough to know that quality sometimes is not enough.
"At this level, teams are dead tight," said Hiddink. "It can drop either way. But if you have big players, as those teams and we have, it would be fantastic to go all the way."
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