I cannae see anyone beating Valverde, with only Kwiatkowski as the real threat if it comes down to a small group finish.
However, in say that, there are a lot of potential contenders, some of whom had crashes at Amstel Gold and might still be feeling the effects, and it is the last chance for someone to get a "Classics" win against their name this year - so the likes of Bardet, Gallopin, Dumoulin, Alaphilippe, Mollema, Rolland, and Yates might give it a go.
I also like the look of Nocentini - he and Bardet might form the basis of an AG2R double act.
Anyway, I'm sticking my money on Valverde - and thanks to a 9/4 winner at Pimlico last night I have a wee bit more money to put on him
edit - and after all that wittering I stuck a small e/w bet on Nocentini as well at 125/1
edit - and Rui Costa was too good a price not to take him e/w as well, especially in the wet