The Serbia Open (Serbian: Отворено првенство Србије, Otvoreno prvenstvo Srbije) was an ATP World Tour 250 series men's tennis tournament held in Belgrade, Serbia and played on outdoor clay courts. The event was held for the first time in 2009, from May 4–10. It was the first for Serbia, as the country never before hosted an Association of Tennis Professionals or a Women's Tennis Association tournament.