El Tanque Sisley
On 19 April 2015, already sold to Atlético Madrid, Schiappacasse made his main squad – and Primera División – debut, coming on as a late substitute for Santiago García in a 2–0 home win against Juventud. He scored his first professional goal on 23 May, netting his team's third in a 4–0 home routing of El Tanque Sisley.