London:Top seeds Spain moved to the brink of a shock Davis Cup exit on Friday when their weakened team slumped to a 2-0 deficit at the hands of Canada in a world group, first round tie played on lightning quick Vancouver hardcourts.

Novak Djokovic was in no mood for upsets, however, and earlier got right back in the groove after his Australian Open triumph with a crushing defeat of Olivier Rochus as Serbia surged into a 2-0 lead in Belgium.

Holders Czech Republic were locked at 1-1 after the first day against a Switzerland side minus world number two Roger Federer - Tomas Berdych levelling the tie after Lukas Rosol had been outplayed by Stanislas Wawrinka.

Germany's hopes of beating Argentina in Buenos Aires suffered a cruel blow, however, as Philipp Kohlschreiber was forced to retire with a hamstring injury when serving for the match at 5-4 in the fifth set against Carlos Berlocq.

A later win for Juan Monaco over Florian Mayer meant Argentina ended the day 2-0 ahead as did France and Kazakhstan in their ties against Israel and Austria respectively.

Croatia and Italy were locked at 1-1 in Turin while the United States took a commanding 2 0 lead over Brazil in Jacksonville after Sam Querrey dispatched Thomaz Bellucci in straight sets and John Isner thumped Thiago Alves.


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