That week he beat a not in form Montanes, and not good clay players in Istomin and GGL, so I would not say Andreev is a huge favorite to win, heck he might not even pass Diego, as he lost to him the last time they met.
Only notable clay win for him is Dasco, but even that might be pushing it.
He's not having one of his best years.
i said he was having his best season in a number of years and your blind if you think he's not
he might not have great wins over great clay courters this season but the point is its his best surface, he's got alot of good results on it and he is playing good tennis. Milos beat him on clay last year but he wasnt playing as well as he is now
on the surface andreev playing well is the favorite
its a moot point because he might not even play igor. Either way milos is the underdog in the next match