Following the January departure of Nicolas Anelka and summer exit of Didier Drogba, the Spaniard is now the number one striker at Stamford Bridge and Cahill is confident he will flourish after a tough start with the European champions.
"Maybe he will relish being the main man this season. He has done that at the start of the season and has been great for us," said Cahill, who along with Torres, scored in the Blues' 4-2 home win over Reading last night.
"It is good to see him score so early in the season.
"He has dealt with pressure before and that won't be any different for him this time.
"He is the main man this year and has got off to a fantastic start.
"Fernando has worked hard in training like he always does. Even when he doesn't score, he works hard for the side.
"To get off the mark already is great and he was scoring goals in the European Championship for Spain so he has taken that sort of form into this season."