Rafael Nadal crushed Novak Djokovic to send Davis Cup holders Spain into the quarter-finals of this season's competition.

With the Spanish leading Serbia 2-1 going into the final day in Benidorm, Nadal took to the court for his much-anticipated match with Djokovic looking to win his 12th straight Davis Cup singles rubber.

It was world number one v world number three but the home player dominated on his favoured clay surface and Djokovic was given little chance as Nadal eased to a 6-4 6-4 6-1 victory.

The result came as no surprise - it was Nadal's sixth win out of six against the Serb in claycourt encounters, with Djokovic having won just won one set in those matches.

Spain, for whom David Ferrer made the final score 4-1 with a comfortable win over Viktor Troicki in the dead rubber, progress to a home quarter-final meeting with Germany.

Nicolas Kiefer was the hero for the Germans in the fourth rubber, with three breaks helping the world number 33 record a 7-6 (7/3) 6-4 6-4 success over Austria's Jurgen Melzer.

A consolation win for Stefan Koubek made the final scoreline 3-2.

There was a shock in Ostrava where the Czech Republic sent the much-fancied France team packing.

Having opened a 2-1 advantage in Saturday's doubles, the Czechs moved into an unasailable 3-1 lead when Radek Stepanek enjoyed a straight-sets victory over Gilles Simon.

Stepanek dominated two tie-breaks to see off the world number eight 7-6 (7/2) 6-3 7-6 (7/0).

The Czechs, who lost the dead fifth rubber, will now host Argentina, who had seen off the Netherlands with a day to spare.

They pushed on whitewash the Dutch on Sunday with singles wins for Martin Vassallo Arguello and Juan Ignacio Chela.

Croatia also wrapped up a 5-0 whitewash over Chile as Roko Karanusic and Ivo Karlovic won the dead singles rubbers.

They will now host USA in the last eight after Andy Roddick clinched victory for his country against Switzerland, beating Stanislas Wawrinka to give his team an unassailable 3-1 cushion.

Roddick eased to a 6-4 6-4 6-2 success in just over two hours on Sunday.

"It's really an honour, we have a great team," said the world number six. "We really play for each other."

Roddick was never troubled by number 16 Wawrinka, who needed treatment on his left shoulder after losing serve in the third game of the second set.

Switzerland were missing world number two Roger Federer, who did not play due to a back injury, but is due to return this week at the Masters event at Indian Wells, California.

James Blake beat Marco Chiudinelli 6-4 7-6 (8-6) in the final rubber to complete a 4-1 victory for the USA.

Russia also progressed to the last eight when they claimed a 4-1 win over Romania in Sibiu.

Although the hosts had given themselves a lifeline with victory in Saturday's doubles, Dmitry Tursunov battled back from two sets down to beat Victor Hanescu 4-6 5-7 6-3 6-4 6-2 in the fourth rubber and clinch victory.

Teimuraz Gabashvili beat Victor Crivoi 6-4 6-2 to make the final score 4-1.

Russia will now travel to Israel, who reached the quarter-finals for the first time ever by edging past Sweden 3-2.

The tie was decided in the final rubber with Harel Levy beating Swden's Andreas Vinciguerra 6-4 4-6 6-4 3-6 8-6.

Israel had gone into the final day 2-1 down but Dudi Sela levelled affairs in Malmo by beating Thomas Johansson, also in five sets.

It was the first time in Sweden's 84-year Davis Cup history that they had lost a tie from 2-1 up.