both guys seems to be out of form atm. Mayer riding four matches losing streak (fognini, pella, vesely, robert). I'd say this is a time to turn it around. Leonardo potential to have some results on clay and I guess he can start here. Nieminen is in serious decline plus he is yet to play a match on clay this year. Bookies make Nieminen clear favourite at 1.5~ but It'd say it's 50/50. Mayer in 3.