Toselli was called up by Bielsa to play his first senior international game for his country against Panama, match that ended in a 2–1 victory of Chile. During the 2010 FIFA World Cup qualification process, he was nominated by Bielsa as third goalkeeper with frequency. For the 2010 FIFA World Cup, it was supposed that Toselli would be the third goalkeeper of Chile, but finally Luis Marín was who achieved this place. Toselli would be called up by Bielsa's successors Claudio Borghi and Jorge Sampaoli during the 2014 World Cup qualifiers and was eventually included in the 23-man squad that played the World Cup.