Italy tested out a three-man defence to face Spain with Claudio Marchisio and Antonio Candreva behind centre-forward Alberto Gilardino.
The Azzurri are forced into a tactical shift after losing Mario Balotelli and Ignazio Abate for the rest of the Confederations Cup.
On Thursday they take on Spain in the semi-final and Cesare Prandelli held his first training session behind closed doors.
La Gazzetta dello Sport sources managed to sneak a view of the proceedings in Fortaleza and reported back use of a 3-4-2-1 system.
It’s an all-Juventus back line with Gigi Buffon in goal, Andrea Barzagli, Leonardo Bonucci and Giorgio Chiellini together.
Emanuele Giaccherini and Christian Maggio are the wing-backs around Daniele De Rossi and Andrea Pirlo, who are back from suspension and a calf injury respectively.
Marchisio and Lazio’s Candreva act as support between the lines for Bologna forward Gilardino.
There will be another training session in a few hours, which will be open to photographers and media for only 15 minutes.
Many hypothesised the Azzurri would adopt a three-man defence against Spain, as it was with this system they earned an impressive 1-1 draw in the Euro 2012 group phase.