Group A
Australia (Tomic and Stosur)
Canada (Raonic and Bouchard)
Italy (Seppi and Pennetta)
Poland (Janowicz and Radwanska)
Group B
Czech Republic (Stepanek and Kvitova)
France (Tsonga and Cornet)
Spain (Robredo and Medina Garrigues)
USA (Isner and Stephens)
Australia (Tomic and Stosur)
Canada (Raonic and Bouchard)
Italy (Seppi and Pennetta)
Poland (Janowicz and Radwanska)
Group B
Czech Republic (Stepanek and Kvitova)
France (Tsonga and Cornet)
Spain (Robredo and Medina Garrigues)
USA (Isner and Stephens)