"You can't do anything, but I will say it because it was so clear. He is amazing because he is massive.
"It's very impressive. I have a lot of clips of him from over the years and he surprises me. After four years, I expected it."
Benitez revealed he had put together a video compilation of Drogba during Liverpool's numerous matches against Chelsea since he became manager.
"We've played against Chelsea 19 games and every time I have collected some clips of Drogba," Benitez explained.
"I have shown them to some of the players. I think that (Martin) Skrtel and Carra (Jamie Carragher) were really good against him the other day, the only problem was the referee was giving fouls. And it was not the same with (Fernando) Torres."