Italy vs Argentina = Clay Court
Czech Republic vs France = Indoor Hard Court
Serbia vs Great Britain = Clay Court
USA vs Croatia = Hard Court
My pick
Lukas Rosol vs Tsonga = Jo-Wilfried Tsonga @ 1.18
Jack Sock vs Marin Cilic = Marin Cilic @ 1.50
Cilic form is quite unstable on Atp Tour but he always done pretty nice job in major tournament as we already saw in last Wimbledon , he almost beating Roger Federer in quarter final
Toto Parlay @ 1.83
Marin Cilic will be very good choice and he is looking promising player, I will take risk only on Marin Cilic @1.50, for me safety is the first in betting, other bet for Jo-Wilfried Tsonga has pretty low odds so that I will avoid this one.