Which female players AREN'T mentally weak?
Dementieva was up 5-3 in that 1st set and lost 4 games in a row after that. Her serve noticably dips when she's ahead. Most of the Russian players are mentally weak, actually. Kuznetsova has choked in a number of matches, as has Myskina (most notably in the Olympics against Henin-Hardenne).
Justine has developed a reputation as a mentally strong player, but I don't buy it. She's stronger mentally than most of the women, but she still often loses leads and gets tight when she's trying to close out sets and matches. She's just better at hanging on than other players.
Kim Clijsters and Amelie Mauresmo are notorious for getting tight in big matches, and Lindsay Davenport hasn't exactly been a model of mental fortitude (she was a set up in each of her last 3 losses in majors).
Who does that leave? Serena Williams is certainly the toughest mentally in terms of female players. Sharapova is up there, too. Even though she choked away the Australian Open SF earlier this year, it's the only match I can think of that she really got tight in. She held up well in the Wimbledon final, as well as at the year-end tournament.
Prayed through the nights
felt so alone
suffered from alienation
carried the weight on my own
Had to be strong
so I believed
and now I know I've succeeded
in finding the place I conceived