Alexander Zverev - Karen Khachanov
Pick: Khachanov 2.50
Zverev undoubtedly has the bigger potential, but he is very much out of form, and he will be up against a tough indoor courter in Khachanov. The russian likes this surface, and he plays at home - furthermore he has a big service game, and he should be able to hold most his serve quite easy.
This is close to a 50-50 match, therefore pick the russian.
I am not touching that match.
On his best days Klizan can beat pretty much anyone, BUT he also tends to beat himself...
Benneteau also playing in the doubles, and his focus might be there.