If you were a real tennis fan you would know the history of the serena-justine rivalry and the fact that henin's poor gamesmanship a few years ago at the french open in 2003:
"There is also a history between these two players that makes them mortal enemies. Four years ago at the French before a key point in their match then, Henin held up her hand just as Serena was about to serve. Williams, seeing this, half-heartedly hit her serve into the net. Williams rightfully expected to be able to hit that first serve again. The chair umpire, though, said she never saw Henin raise her hand to stop play. Henin, in a stunningly ruthless gamesmanship maneuver, refused to acknowledge that she held up her hand, essentially costing Williams her first serve. The French fans showed their bias and booed Williams (Henin is from the French portion of Belgium). Serena was shaken and never recovered from that point. She lost her serve that game and eventually the match."
Or did you come on here then and start a thread about what a poor sport henin was?