Key Italy midfielder Sando Tonali is expected to be fit, despite missing Newcastle United’s derby loss at home to Sunderland on Sunday.
Inter Milan defender Alessandro Bastoni remains a doubt, but he played a small role in training, and Gattuso said striker Gianluca Scamacca “is a little further behind”.
In his press conference, Gattuso – a World Cup winner as a player in 2006 – brought up Northern Ireland’s style of play and said Italy will have to adapt to a “direct approach”.
In response, O’Neill said “we don’t consider any of that” when it came to setting his team up.
“They really believe a great deal in what they’re doing, with the second balls and they like to play direct, vertical football,” added Gattuso.
“They are certainly a team that when they get players into the box, both with crosses and from dead-ball situations, they’re incredible.”
Gattuso acknowledged the running power and energy of their opponents, but said being direct was “their main skillset” and “where they will cause us the most problems”.
“I haven’t seen a team that’s necessarily going to be keeping the ball and dragging you out of position in the middle of the park,” he added.
“They play very direct and everything that they do, they do it in an impressive fashion.”