Czech Republic will face reigning champions Spain in the Davis Cup final after easing past Croatia.

The Czechs reached the final in comprehensive style with Tomas Berdych and Radek Stepanek racing to a 6-1 6-3 6-4 victory over Marin Cilic and Lovro Zovko in the doubles.

Berdych and Stepanek, who both won their singles matches on Friday, made it an unassailable 3-0 lead.

Spain also completed a comfortable victory over Israel as Feliciano Lopez and Tommy Robredo won their doubles match against Jonathan Erlich and Andy Ram 7-6 (8/6) 6-7 (7/9) 6-4 6-2 to take a 3-0 lead of their own.

The final will be in Spain, and probably on clay, in December.

Both ties finished 4-1 after the dead rubbers were split on Sunday.

Roger Federer ensured Switzerland will stay in the World Group by crushing Potito Starace on Sunday.

Federer won 6-3 6-0 6-4 in one hour and 41 minutes to give the Swiss a unassailable 3-1 lead in their play-off with Italy in Genoa.

France will also keep their place among tennis' elite after beating Holland.

Jo-Wilfried Tsonga clinched the crucial third point for the French, beating Thiemo de Bakker 7-6 (7/5) 6-2 3-6 7-6 (7/4).

De Bakker had shocked Gael Monfils in Friday's opening rubber but France stormed back to win the next three.

It was a similar story in Sweden where the hosts lost the opening rubber but then won the next three to see off Romania.

Robin Soderling clinched the victory on Sunday, beating Victor Hanescu 7-5 6-1 6-0 in the fourth rubber.

Arguably the most exciting play-off came in Charleroi where hosts Belgium won the final rubber against Ukraine to book their place in next season's top flight.

Sergiy Stakhovsky kept the tie alive by beating Xavier Malisse in five sets but Steve Darcis was the home hero, thrashing late replacement Sergei Bubka 6-2 6-1 6-0 in the deciding match.

Somdev Devvarman earned India victory in South Africa, beating Rik De Voest in five sets to take his side to the three-point mark in the fourth rubber. Devvarman came from two sets down to win 3-6 6-7 (3/7) 7-6 (7/5) 6-2 6-4.

In the fifth rubber Yuki Bhambri came back from a set down against Izak Van der Merwe to claim a 3-6 6-3 6-4 victory to complete a final 4-1 scoreline.

Ecuador won 3-2 in their play-off in Brazil, with Nicolas Lapentti beating Marcos Daniel 8-6 in the fifth set of Sunday's first reverse singles to give the visitors an unassailable lead.

Chile were taken to the fifth and deciding rubber by Austria after leading 2-0 going into Saturday's doubles.

On Sunday Jurgen Melzer beat Paul Capdeville in the opening singles to continue the Austrian comeback and square the tie at 2-2.

But Nicolas Massu saw off Stefan Koubek in four sets in the decider to clinch victory for the home side.

Elsewhere, Serbia completed a 5-0 victory over Uzbekistan.

The eight play-off winners will go into Wednesday's draw for the 2010 World Group.