Juventus striker Iaquinta: Chelsea tougher under Hiddink
He said: "Chelsea were in a negative period but with the change of coach, something will happen to them.
"I expect things to be different.
"When we come to London, we have to be on our guard.
"You look at Hiddink's record and you see he has done well with virtually every team he has coached.
"He is always very well prepared for games like these."