Infobox last updated on: 23 February 2009.
Joseph Sirianni (born 17 January 1975) is an Australian tennis player from Melbourne, Victoria. Sirianni was born to father Joseph and mother Ida. Sirianni turned professional in 1996 and he plays right-handed. He achieved his career-high singles ranking of World Number 138 on 20 October 2008. Sirianni has participated in the Australian Open on five occasions (1999, 2000, 2003, 2008, 2009).
Sirianni earned a wildcard into the main draw of the 1999 Australian Open Men's Singles Draw. While he lost in the first round to Mariano Zabaleta, the match went into a fifth set. Eventually, Zabaleta won 3–6, 6–4, 6–3, 4–6, 6–2.