Career
He also played for Genoa"s U17 team since 2004-2005 season. In July 2009, Costantini left for Lega Pro club Ternana. In July 2010 Costantini was sold to Lucchese in co-ownership deal for €500.
He only played 3 starts for the Group B side of the third division.
In June 2011 Genoa bought back Costantini for €500 and soon Lucchese went bankrupted. In July 2011 Costantini left for Foligno on free transfer.
After 8 starts with the Group A side of the prima divisione, Costantini left for A.C. (before Christ) Prato on 30 January 2012. At the end of season Foligno relegated directly as the least, and Prato had to play relegation "play-out".
Costantini played two friendlies in 2005-2006 season for Italy national under-17 football team
