MILAN (AP) -- Lazio beat Siena 4-1 on penalties to advance to the Italian Cup quarterfinals on Wednesday.
Siena appeared to be heading for the next round, in new coach Giuseppe Iachini's first match in charge, after a comedy own goal 10 minutes into the second half.
Lazio goalkeeper Juan Pablo Carrizo did well to deny Francesco Valiani but defender Michael Ciani's attempted clearance then crashed off teammate Lorik Cana and into the net.
However, Ciani atoned for his error by heading in an equalizer in the fifth minute of stoppage time.
Siena missed several chances in extra time before Simone Vergassola and Marcelo Larrondo had their spot kicks saved in the shootout.
Lazio will next face Catania, which beat Parma on penalties last week.
Fiorentina will face Roma after a 1-0 win over Udinese.
Borja Valero capitalized on an error from Dusan Basta to score the only goal of the game in the 36th minute.