 Due to an injury to first choice goalkeeper Doni and poor performances by backup Artur, Júlio Sérgio made his debut in Serie A on 30 August 2009 against Juventus, a game which Roma lost 1–3 and a defeat that lead to the resignation of Roma coach Luciano Spalletti.Despite this, Júlio Sérgio was preferred by new head coach Claudio Ranieri in his first game in-charge in a 2–1 away win at Siena on 13 September.Strong performances ensured Julio Sérgio more regular football and ultimately allowed him to become the new first choice keeper for the Giallorossi.