Fiorentina ground out a 2-1 victory over second-division side Siena to reach the Italian Cup semifinals on Thursday.

Marvin Compper headed home a corner 15 minutes from time to book Fiorentina a two-leg tie against Udinese, which beat AC Milan on Wednesday.

Josip Ilicic gave Fiorentina the lead in the 20th minute, shrugging off his marker to control a ball before slotting under diving Siena goalkeeper Simone Farelli.

Guillermo Giacomazzi levelled on the hour mark with a glancing header from Francesco Valiani's free kick.

Siena almost equalized immediately after Fiorentina's opener but Neto pulled off a fantastic save to fingertip Michele Paolucci's effort away from his top left corner

Neto pulled off another good save in stoppage time to keep out Alessandro Rosina's swerving strike.