Djokovic wins for Serbia

Viktor Troicki of Serbia also won a five-set match against Croatia’s Borna Coric – the teenage sensation who eliminated Andy Murray from the Dubai Open. Croatia were without their top ranked player Marin Cilic, the US Open champion.

Swizterland, minus Roger Feder and Stan Wawrinka, ended the first day of action tied 1-1 with Belgium.

Henri Laaksonen beat Ruben Bemelmans??1-6, 6-7 (6/8), 6-4, 6-0, 6-2 but Belgium’s Steve Darcis hit back with a thrashing of Michael Lammer.

Gilles Simon and Gael Monfils ensured France won both matches against Germany’s??Jan-Lennard Struff and Philipp Kohlschreiber, respectively.

Australia also won twice against Czech Republic after teenager Thanasi Kokkinakis shocked Lukas Rosol, while Bernard Tomic beat Jiri Vesely.

Italy and Kazakhstan ended their first day singles level at one apiece, as did Argentina and Brazil, while Canada v Japan will complete the draw.