Hernanes sparkles in Lazio win
German forward Miroslav Klose was also on target as Lazio, enjoying a superb start under new coach Vladimir Petkovic, won their first three matches of the league season for the first time since 1974.
Napoli and titleholders Juventus also have a maximum nine points after both enjoyed 3-1 wins over Parma and Genoa while Sampdoria have a 100 per cent record but have only eight points after having one deducted over the Calcioscommesse match-fixing scandal.
AS Roma, who produced a masterclass of attacking football as they won 3-1 at Inter Milan in their last game, squandered a 2-0 lead and lost 3-2 at home to Bologna while Udinese also blew a 2-0 goal advantage in a 2-2 draw at Siena.
Diego Milito and Antonio Cassano scored in each half to give Inter a 2-0 win at promoted Torino in the evening game, leaving the visitors with six points from three games.
Hernanes put Lazio ahead with a superb solo effort in the fifth minute, evading two tackles before firing in a long-range left-foot shot which went in off the post. The Brazilian midfielder, overlooked by national team coach Mano Menezes since February, also set up the second goal when he again left his marker for dead.
Although he was foiled by Chievo goalkeeper Stefano Sorrentino, Klose was on hand to score from the rebound in the 38th minute.