Guus Hiddink has warned Europe's top defenders that they will will have to be at their very best to contain a rampant Didier Drogba.
The Ivorian striker scored his fourth goal in five games as Chelsea reached the last eight of the Champions League with a 2-2 draw in Turin.
The result made Drogba's first-leg winner at Stamford Bridge all the more important as the Blues ran out 3-2 aggregate winners. Hiddink said: "He's very important, how he's showing his commitment and how he's always busy."
Drogba was on target in the 83rd minute as Hiddink's side twice came from behind to thwart Juve at the Stadio Olimpico.
Hiddink added: "He doesn't give you, as a central defender, an easy night. When he scores, it's even better.
"He's doing very well. For the second goal, he came just ahead of his marker. That's a sign that he is sharp."
Drogba admitted Chelsea's tactics were uncertain until Juve's opener.
"We didn't really know what to do, if we should attack or not, so we played counter-attacking football," Drogba explained.
"When they scored, we decided to play our game so I think it was a good thing they scored.
"You always want to start out to win the game, but at some point it was difficult to take a decision and I think the goal really helped us."
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