Chelsea boss Ancelotti: Joe Cole is a genius
The England midfielder, out for 10 months after damaging his knee ligaments against Southend in the FA Cup last January, produced a performance full of trickery and flair against Rovers.
"I was impressed with Joe because I know very well how hard he has worked in the last month," said Ancelotti.
"He is a great professional and after 10 months it is not easy for Joe to play like he did. It was a surprise and I am happy for him.
"Joe is a very important player for us. He has fantastic quality in midfield. He is a genius."