Italy's Alberto Gilardino (L) celebrates his goal with Antonio Candreva during the 2014 FIFA World Cup qualifier match against Bulgaria at the 'Renzo Barbera' stadium in Palermo, Italy, on Sept. 6, 2013. Italy won 1-0. (Xinhua/Zhou Lei)

Italy's goal keeper Gianluigi Buffon tries to save the ball during the 2014 FIFA World Cup qualifier match against Bulgaria at the 'Renzo Barbera' stadium in Palermo, Italy, on Sept. 6, 2013. Italy won 1-0. (Xinhua/Zhou Lei)

Italy's Andrea Pirlo reacts during the 2014 FIFA World Cup qualifier match against Bulgaria at the 'Renzo Barbera' stadium in Palermo, Italy, on Sept. 6, 2013. Italy won 1-0. (Xinhua/Zhou Lei)

Italy's Daniele De Rossi (Front) falls on the ground during the 2014 FIFA World Cup qualifier match against Bulgaria at the 'Renzo Barbera' stadium in Palermo, Italy, on Sept. 6, 2013. Italy won 1-0. (Xinhua/Zhou Lei)

Players of Italy and Bulgaria compete during the 2014 FIFA World Cup qualifier match between Italy and Bulgaria at the 'Renzo Barbera' stadium in Palermo, Italy, on Sept. 6, 2013. Italy won 1-0. (Xinhua/Zhou Lei)

Italy's Andrea Pirlo passes the ball during the 2014 FIFA World Cup qualifier match against Bulgaria at the 'Renzo Barbera' stadium in Palermo, Italy, on Sept. 6, 2013. Italy won 1-0. (Xinhua/Zhou Lei)

Italy's Alberto Gilardino (Front) heads the ball during the 2014 FIFA World Cup qualifier match against Bulgaria at the 'Renzo Barbera' stadium in Palermo, Italy, on Sept. 6, 2013. Italy won 1-0. (Xinhua/Zhou Lei)

Italy's goal keeper Gianluigi Buffon (L) tries to save the ball during the 2014 FIFA World Cup qualifier match against Bulgaria at the 'Renzo Barbera' stadium in Palermo, Italy, on Sept. 6, 2013. Italy won 1-0. (Xinhua/Zhou Lei)

Spas Delev (R) of Bulgaria reacts after the 2014 FIFA World Cup qualifier match against Italy at the 'Renzo Barbera' stadium in Palermo, Italy, on Sept. 6, 2013. Italy won 1-0. (Xinhua/Zhou Lei)