Roberto Chiacig (born 1 December 1974 in Cividale del Friuli, Italy) is an Italian professional basketball player for Gecom Mens Sana 1871 Siena of the Serie B Basket.Playing as a center, his most notable achievement was the silver medal obtained by Italian national team of which he was a member at the 2004 Summer Olympics.Beyond playing internationally, he also has had a long club career in Italy and abroad, winning a Lega Basket Serie A title with Montepaschi Siena.