IMO, Dementieva is Davenport's strongest challenger left in San Diego. Obviously neither Myskina nor Zvonareva would b e sure wins for the Californian in the finals, but she has never lost to eithe rone and I think her game matches up against them much better. Dementieva is more aggressive and therefore more able to get Davenport on the run early in the rally. Davenport also really hates Dementieva's low, slicing serves out wide on the Deuce side. She really doesn't know what to do with them on off days. If she rolls it back crosscourt, Dementieva is there to hit into the open court, and Davenport, being one of the less mobile players on tour ;), can't make it back into the court in time. Lindsay has also tried to simply go for the down-the-line winner right away off those serves in past meetings against Dementieva, but that requires that she stay very low through contact and also get enough topspin on the ball - two things which she does not always execute properly. I remember her missing many of those returns well long in her 2003 loss to Elena in Amelia Island.
Anyway, I still like Davenport's chances considering her form and confidence right now. Dementieva will not have the luxury of giving away any cheap points with double faults tomorrow. This is not clay, so she will certainly have a much tougher time tomorrow than she did at the French.