Holders Juventus are out of the Italian Cup after being thumped 3-0 at Atalanta in the quarterfinals on Wednesday.
The Turin giants' bid for the fifth consecutive Cup triumph was stopped by a goal by Timothy Castagne and Duvan Zapata's double.
AS Roma suffered an even more embarrassing defeat, going down 7-1 at Fiorentina, with Federico Chiesa scoring a hat-trick and substitute Giovanni Simeone netting twice for the Florence side.
Roma forward Edin Dzeko was sent off, apparently for spitting at the referee.
Fiorentina and Atalanta will face each other in the semifinals.
AC Milan will face the winner of Thursday's match between Inter and Lazio in the other semi after they beat Napoli 2-0 on Tuesday.
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