2011 Hopman Cup grand slam final at the US Open and winning the Davis Cup as well as reaching a career high of world number two in 2010. Ivanovic is the 2008 French Open champion and former world number one as ranked by the Women's Tennis Association and 2008 Australian Open finalist. Ivanovic had a mixed 2010, she teamed up and then split with Heinz Günthardt before winning her first title in two years at Linz before picking up the Tournament of Champions in Bali she is currently the world number seventeen. The pair have played together in the Hopman Cup before in
Japan at the Hopman Cup Japan at the Hopman Cup Japan is a nation that has competed at the Hopman Cup tournament on five occasions, the first being at the inaugural annual staging in 1989. Before the introduction of the round robin competition format in 1996, Japan never passed the first round and since its introduction, the nation has never passed the qualification stage of the tournament. Japan also participated in the first two stagings of the now defunct Asian Hopman Cup, a qualifying tournament which ran from 2006 until 2009 and granted the winners entry into the Hopman Cup the following year. In both