"The key to winning on Sunday will be stopping Ronaldo? Maybe it will be stopping Torres. Ronaldo is in form but so too is Torres," said Benitez.
"It's a fantastic achievement to score 20 league goals in your second, third or fourth season, so to do it in your first is even better.
"He continues to improve and work really hard. It's too early to draw comparisons with other Liverpool strikers, you need a few more years before you can do that.
"But right now he is a very good player and can get better."