Nenad Zimonjić (Serbian Cyrillic: Ненад Зимоњић, pronounced [nênaːd zǐmoɲitɕ]; born 4 June 1976) is a Serbian former professional tennis player who was ranked world No. 1 in doubles. He is an eight-time Grand Slam champion, having won the 2008 and 2009 Wimbledon Championships as well as the 2010 French Open in men's doubles partnering Daniel Nestor. In mixed doubles, Zimonjić won the 2004 Australian Open partnering Elena Bovina, the 2006 and 2010 French Opens partnering Katarina Srebotnik, the 2008 Australian Open partnering Sun Tiantian, and the 2014 Wimbledon Championships partnering Samantha Stosur. He has also reached nine further major finals across the two disciplines.