Berdych sends Czechs through
Tomas Berdych overcame the exertions of the longest ever Davis Cup match to book Czech Republic's place in the last eight against Switzerland.
Berdych ensured the champions' passage to the quarter-finals with a 6-3 6-4 3-6 7-6 (7/5) victory over the luckless Stanislas Wawrinka, who was also involved in Saturday's epic seven-hour doubles contest.
Wawrinka, who lost a five-hour battle to Novak Djokovic at the Australian Open last month, had given Switzerland a 1-0 lead in the tie on Friday but found himself on the wrong end of yet more punishment in Geneva.
On Saturday, he and Marco Chiudinelli were beaten 6-4 5-7 6-4 6-7 (3/7) 24-22 by Berdych and Lukas Rosol in a record-breaking match that lasted seven hours and one minute.
That surpassed the previously longest Davis Cup match of six hours and 22 minutes played by John McEnroe and Mats Wilander in 1982 before tie-breakers had been introduced.
Berdych was comparatively untroubled on Sunday as he took three hours and 15 minutes to secure an unassailable 3-1 lead and book a last-eight meeting with Kazakhstan in April.
Henri Laaksonen won the dead-rubber reverse singles 0-6 6-3 6-1 against Jiri Vesely to at least give the home fans some cheer.
Argentina will host France in the next round after they both completed 5-0
In Buenos Aires, Juan Monaco and Carlos Berlocq were both straight-set winners to brush aside Germany.
Monaco beat Tobias Kamke 6-4 7-6 (7/2) before Berlocq completed the rout 6-2 6-4 over Christopher Kas.
France were similarly untroubled against Israel as Michael Llodra beat Noam Okum 6-3 7-6 (7/5) before Richard Gasquet's 6-4 6-3 win over Amir Weintraub.
Serbia lost both of today's dead reverse singles rubbers against Belgium after world number one Djokovic was rested with his nation already through.
In Djokovic's absence, David Goffin beat Boris Pashanski 6-4 2-6 6-2 while Steve Darcis defeated Nenad Zimonjic 6-2 6-2.
Last year's finalists Spain paid for the absence of their star names, including Rafael Nadal, as they were bundled out by Canada.
Rising star Milos Raonic fired the north Americans into an unassailable 3-1 lead after he beat Guillermo Garcia-Lopez 6-3 6-4 6-2.
Nadal was unavailable, along with the likes of David Ferrer, as he continues his comeback after nine months out with a knee injury and, more recently, a stomach virus.
Canada will meet Italy in the next round after the latter completed a 3-2 win over Croatia.
Fabio Fognini claimed the decisive tie when he recovered from losing the first set to beat Ivan Dodig 4-6 6-4 6-4 6-4.
Marin Cilic had earlier levelled matters with a 6-3 6-3 7-5 success over Andreas Seppi.