Pakistan, April 28 -- Emma Hayes said Chelsea know they will need to produce a perfect display if they are to overcome holders Barcelona at a sold-out Stamford Bridge on Saturday and progress to the Women's Champions League final.

Erin Cuthbert's goal earned Chelsea a 1-0 first-leg victory a week ago, the only defeat Barca have suffered in the 39 games they have played this season, but Hayes urged caution ahead of the return. Her side were eliminated at the same stage by the same opposition last season, when Caroline Graham Hansen's goal in the fourth minute was enough to earn a first-leg win in west London for the Liga F champions, before a 1-1 draw at the Nou Camp confirmed Chelsea's exit.

"They're the best team in the world, I've sai...