Group A
Germany
Alexander Zverev
Angelique Kerber
Canada
Vasek Pospisil
Eugenie Bouchard
Belgium
David Goffin
Elise Mertens
Australia
Thanasi Kokkinakis
Daria Gavrilova
Group B
Switzerland
Roger Federer
Belinda Bencic
USA
Jack Sock
CoCo Vandeweghe
Russia
Karen Khachanov
Anastasia Pavlyuchenkova
Japan
Yuichi Sugita
