Benitez believes David Luiz, who captained Brazil at Wembley, moving into midfield has given Lampard the opportunity to influence games in attack.
"When he (Lampard) has a holding midfielder it's easier for him to go forward," Benitez said.
"David Luiz can give you balance in the middle. He understands the role.
"He knows Lampard and Ramires are players who like to go forward, so to have a player like Luiz who can stay in the middle is important for him and also for the centre-backs because they are more protected.
"His quality in possession is really good. He's a player that can see the game and pass the ball with pace. "He can still improve his shooting - but he is doing well."