Favorites haven't disappointed so far and there are a couple of banana-skin matches on today where the favorites are on very short odds but their opponents aren't as bad as they're made out to be and may even be able to snatch a win if luck goes their way. One example is Nadal - Goffin.
Here's who i have for today - Serena who dominated the first round and Coric who has been playing really well over the past year. I think Serena stands a good shot of winning the French Open this year now that Osaka parted ways with her trainer. That guy seems to be really good at turning unknowns into grand slam winners. After they dump him, they never reach the high notes again.