Career
Youth career
At the start of 2005-2006 season he once returned to Sandonà after the loan expired but signed outright by Udinese on 31 August 2005. He was in the Udinese"s Primavera under-20 squad that lost to Inter Primavera in the League playoffs round semi–final in 2007-2008 season. He then left for Swiss Challenge League side Louisiana Chaux-de-Fonds and on 30 January 2009 signed by Internazionale.
He made his debut for Primavera team on the next day.
That half season he made 7 appearances. Lega Pro clubs
In August 2009, he was loaned to Villacidrese of Lega Pro Seconda Divisione along with Inter team-mate Matteo Lombardo.
Toppan made his professional debut with Villacidrese, but on 1 February 2010 loaned to Serie A side Catania for their Primavera team, with a handful appearances. On 29 June 2010, he was sold to newly promoted Prima Divisione side Spezia in co-ownership deal, for a peppercorn fee of €500.
He was the understudy of Daniele Pedrelli, also an Inter youth product.
He failed to play any league matches due to injury. In June 2011 Inter gave up the remain 50% registration rights to Spezia. On 4 August he terminated his contract in order to join fellow third division club United States. Foggia on free transfer.
After Foggia"s bankruptcy, Toppan was signed by his hometown club Treviso, rejoining Inter team-mate Jacopo Fortunato and Antonio Esposito.
Toppan made his debut in a friendly match. International career
Toppan received a call-up from Italy U17 team for 2007 Union of European Football Associations European Under-17 Football Championship qualification in November 2006, but not selected to any match, even as unused substitute.
He also received a call-up on 2 January (for training camp and against local teams) and against Republic of Ireland U17 on 23 and 25 January to prepare for the elite round. On 6 September 2007, he received a call-up from Italy U18 (for training camp) and again on 27 September.
On 24 April 2008, he received his last call-up, against Serbia U18 (Serbian: Млађе омладинске селекције Србије), where he made his debut in the second half, substituted Daniele Mori.
