Juventus coach Andrea Pirlo is wary facing Serie BSPAL in the Coppa Italia.
Pirlo admits SPAL are enjoying an impressive season.
"There are many dangers in this fixture, because we are facing a team that is only Serie B level on paper," the coach told JTV.
“If we look at the other countries, we can see that Bayern Munich went out of their cup competition to a second division side, so did Real Madrid.
“We have to go into this knowing it's a difficult match. Our aim is to get through to the next phase, so we need the utmost concentration. SPAL have done really well in the Coppa Italia and Serie B this season, we cannot underestimate them."
SPAL knocked Monza, Crotone and Sassuolo out of the tournament to remain the only Serie B side in the quarter-finals.
“They are a very good side who like to play football. SPAL tend to use three defenders, but at times three strikers or two support players for the centre-forward. They know how to play and we must be at our best to avoid embarrassment."
