[7] Toppan made his professional debut with Villacidrese, but on 1 February 2010 loaned to Serie A side Catania for their Primavera team,[8] with a handful appearances.
[6] On 29 June 2010, he was sold to newly promoted Prima Divisione side Spezia in co-ownership deal, for a peppercorn fee of €500.
[15] After Foggia's bankruptcy, Toppan was signed by his hometown club Treviso, rejoining Inter teammate Jacopo Fortunato and Antonio Esposito.
[16] Toppan received a call-up from Italy U17 team for 2007 UEFA European Under-17 Football Championship qualification in November 2006, but not selected to any match, even as unused substitute.
[20] On 24 April 2008, he received his last call-up, against Serbia U18 (Serbian: Млађе омладинске селекције Србије),[21][22] where he made his debut in the second half, substituted Daniele Mori.