Roger Federer kept Switzerland in the Davis Cup World Group when he crushed Potito Starace of Italy.

Federer won 6-3 6-0 6-4 in one hour and 41 minutes to give the Swiss a unassailable 3-1 lead against 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.

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.

The two semi-finals had both been decided on Saturday with Spain and the Czech Republic both opening unassailable 3-0 leads.

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

In Murcia, David Ferrer defeated Israel's Andy Ram 6-3 6-1 to extend Spain's lead but Harel Levy made the final score 4-1 by securing a 7-5 6-2 win over Feliciano Lopez.

In Porec, Jan Hajek defeated Roko Karanusic 7-6 6-4 before Croatia avoided a whitewash when Lovro Zovko beat Lukas Dlouhy 6-3 6-4.

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