Conte raised many eyebrows when his revolutionary approach was suggested over the summer.
"I really laughed when people talked about Juventus and the 4-2-4," revealed Reja.
"I wish that were the case, but it's tough to support four men on the attack giving reference points to your opponents.
"We will be facing a side that attacks with three men, plus two midfielders who are very good at slotting in, especially Claudio Marchisio.
"It is going to be a great game on Saturday night and a new one, as I've never faced Conte before.