MILAN, Sept 17 (Reuters) - AS Roma and Palermo maintained their winning starts to the Serie A season on Sunday with victories that leave them as joint leaders after two games while AC Milan also kept their 100 percent record.
Chile midfielder David Pizarro scored his first league goal for Roma in their 3-1 victory at Siena with Brazilian Rodrigo Taddei and Stefano Okaka Chuka also on target.
Milan were set on their way to victory at Parma by a superb free kick from Dutchman Clarence Seedorf before a late penalty from Brazilian Kaka secured a 2-0 victory at the Tardini stadium.
David Di Michele scored both Palermo's goals in their 2-1 win away to Lazio to complete a good week for the Sicilian club who won at West Ham United in the UEFA Cup on Thursday.
Lazio's second straight loss left them on minus 11 points due to the penalty imposed by a sports tribunal which investigated Italy's match-fixing scandal.
Fiorentina, who began the campaign on minus 19, remain bottom of the table after suffering another defeat with their 1-0 loss to Tuscan rivals Livorno.
On Saturday, champions Inter Milan were held to a 1-1 draw at home to Sampdoria.
Roma's goals all came in the second half of their game at Siena who had Ezio Brevi sent off in the 27th minute after an ariel challenge on Roma's Daniele De Rossi.
After the break Brazilian former Siena winger Taddei put Roma ahead, poking home after good work from Italy international Simone Perrotta.
Then Pizarro made it 2-0, sliding home from close range before Brazilian Mancini struck the post for Roma.
Siena pulled a goal back through a scrambled Mario Frick effort before 17-year-old Okaka Chuka secured the win with Roma's third.
Seedorf fired Milan in front in the 24th minute with a beautifully struck free kick from more than 25 metres but Carlo Ancelotti's side didn't have things all their own way.
Milan striker Alberto Giladino had to go off with a head injury - he was taken to hospital for tests - and then in the 68th minute Croatian defender Dario Simic did superbly well to clear off the line an Andrea Gasbarroni effort.
Victory was secured for Milan in the 86th minute when Brazilian Kaka was brought down inside the area by Parma keeper Alfono De Lucia and he rose to convert the spot kick.
Milan began the season on minus eight points, imposed by the same sports tribunal, but their victory moves them to minus two.
Palermo made Lazio pay for some sloppy defending with ex-Udinese striker Di Michele in clinical form.
Di Michele sprung Lazio's offside trap to give the visitors the lead with an 11th minute lob over the advancing Angelo Peruzzi.
Then the forward struck again in near identical fashion seven minutes before the break when he finished off a counter-attack with a cool lob.
Tommaso Rocchi pulled one back for Lazio and they had a chance for an equaliser but midfielder Stefano Mauri wasted a great opportunity.