Champions Juventus underlined their Serie A title credentials by going top as Inter Milan were humbled 3-1 by a Francesco Totti-inspired Roma at the San Siro on Sunday. AC Milan, who finished runners-up to Juventus last season but stuttered against Sampdoria last week, got their scudetto campaign back on track on Saturday when Giampaolo Pazzini struck a hat-trick in a 3-1 win away at Bologna.  In Sunday’s earlier match Juventus produced a similarly commanding performance in a 4-1 win away to 10-man Udinese which included a brace from Sebastien Giovinco and gave them two wins from two. While Udinese chief Giampaolo Pozzo was furious at the referee’s decision to send off his ‘keeper Zelijko Brkic for a foul on Giovinco, the little striker known as the “Atomic Ant” was unforgiving.  “Today it was important to win and give a signal and we did that,” said Giovcinco.