Robert won their only previous meeting in May 2014. That was on clay in Rome and he won in straight sets.
Ramos had a good week last week and reached the quarter finals in Vienna indoors. He also reached the quarter finals the week before in Moscow.
Robert reached the semis in Moscow and narrowly lost to Kohlschreiber last week in a third set tie break. He has slightly better stats indoors.
I think Robert has a chance today and the crowd will be with him. They play during the evening session so there should be a decent turnout. Three sets seem likely.
Value is on Robert. Ramos starts as slight favourite at around 1.77.