If Mirjana hits a purple patch, she can beat anyone imo....but that doesn't happen on hard court anymore really.
Most assuredly, Mirjana playing her cleanest tennis can hang-with and or beat any Top 10-caliber star. She's demonstrated that in her first go-around against Steffi, Serena, Monica, Pierce, Novotna, etc. and she has done so in her second act, e.g. Bartoli, Jankovic.
She played some sharp hard-court tennis in 2010 and 2011, at both US Opens and in a number of year-end ITFs. 2012 was not so good for her on hard court, obviously.
She will have to rise to the occasion against Lucie, no question about it. But, on the right day she's capable of that.
Regardless, at least at this twilight hour of her career she is out there laying it on the line in Grand Slam main draws against the very best in the world. So many people used to laugh at the very idea she would ever get into such a position again. Ever. In that sense, Mirjana got the last laugh on the naysayers.
Lucie is not some divine being: she is human and can be beaten. Mirjana simply has to think that way, go out there and beat the woman. She needs to move superbly, serve very well, and execute a good backcourt plan against the lefty-voodoo of Lucie and focus extra-hard. The grueling work? Mirjana has already put that in, off-court and on.
It is not an impossibility for Lucic to win. Not at all.