Now that we consider it maybe it is a rivalry that is well match. Justine Henin, who is back and how after twenty months of break from professional tennis has once again blasted her way into the semi-final at the Australian Open. The Belgian beat Nadia Petrova of Russia in two tight straight sets and has now to face Zheng Jie of China, a first-timer to the big matches relatively. Zheng Jie has made to the semi-finals of a Grand Slam once previously and is the only player from China to have advanced so far into a Grand Slam in recent tournaments. Both women are in rip-roaring form and it is a really tough one to call.