Guus HiddinkÂ has warned ChelseaÂ the hard work is yet to come if they are to overcome Juventus and progress to theÂ quarter-finals of theÂ Champions League.
Striker Didier Drogba gave Chelsea a slender advantage ahead of their last-16 second leg contest in Turin in a fortnight with a 12th minute winner at Stamford Bridge.
"It is good to have a clean sheet because Juventus now have to try and score," said Hiddink.
"We will try to score there, but it will be difficult.
"Juve are smart and are always dangerous around the box. It will be hard."
Hiddink had no complaints about goal hero Drogba, who was marginalised by predecessor Luiz Felipe Scolari.
TheÂ Dutchman insists he has never had a problem with the Ivorian's commitment or motivation since he succeeded the Brazilian.
"I cannot and will not talk about the past because I was not here to judge, but what I normally ask from professional players is to be very committed," added Hiddink.
"There has not been one player that I have had to motivate. If I had to motivate a player, then I think I start fighting with him or neglecting him.
"I have not had this problem at all with Drogba. From the first day I was here, he enjoyed training and worked hard. He worked hard against Villa and again against Juventus. I don't have any problems with under-motivated players."
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